Denver Show Report - September 2017

12 September 2017



It's that time of year for the Crystal Classics team to cross the Atlantic and enjoy the hospitality that is Denver.
One of the loveliest places to visit in the States, Denver annually plays host to a series of
fine mineral exhibitions attracting most of the worlds most dedicated collectors
and enthusiasts and its a great place to
catch up with all the mineral gossip that we all crave.

This year, as in Previous years, Crystal Classics had two rooms, 225 and 227 for the "Denver Fine Mineral Show"
to be held at the Denver Marriott West Hotel and of course, we will have our usual room at
the Denver Gem & Mineral Show (known as “The Main Show” at the Denver Mart)

The crystal Classics team arrived in fits and starts this year with the two girls,
Diana and
Debbie beating Wayne and Dave here by a few days, and as a result,
a lot of the preliminary work had already been completed by the time we arrived - thanks girls.

Dave and Liz Hacker arrived here on Monday, so we were all here in good time
and the displays are well under way.

The "Denver Fine Mineral Show" being the first of our venues was the first to be set up.
In a process that most hotels in Europe would highly disapprove of, we are allowed 
by the management
(as all dealers at the show are) to alter our rooms to "show rooms" for the duration of the show, so long as they are
returned to their exact original state when we leave.
So this is how room 225 started out as we took possession....


...and the process of changing it to a show room begins...

Soon it begins to look like a showroom....

The show cases in position, cleaned and nearly ready for
the specimens to 
be displayed.

Debbie and Wayne organising the office area and mineral specimens
for distribution to each of the two rooms.

Just a few of the flats of great minerals recently acquired
for this years show in Denver.

Diana hard at work picking and arranging specimens 
for the displays in room 225.

The end result for Room 225... A colourful display of mineral specimens
in four show cases from around the world shown at their best.

But what about Room 227......Well, this year we decided to lay our flats of specimens on tables
around the room so that collectors would be able to search through the flats and choose from a range
of brightly coloured specimens to suit their particular interest.
Each flat was labelled with the country of origin for the specimens it contains making it easy for viewers
to locate the specimens that particularly interest them. 

Flats of specimens ready for the collectors to choose


In room 225 are some of our finest specimens - here are some of them.
Please remember that, although we bring and show many fine specimens to this and other shows,
we do not always sell all. So, if there is anything in these images that you like please
do not hesitate to get in touch with us as soon as you can -  
the piece you like might be still available and we can reserve specimens for you!

 First some great pieces from the Gem mineral show case:

A super blue capped Tourmaline crystal showing a multi coloured core from
the Otjua Mine, Otjua Farm 37, Karibib District, Erongo Region, Namibia.

Heavily etched pale blue "Aquamarine" crystal without matrix from
Córrego São Francisco, Cury, Almenara, Minas Gerais, Brazil.

One of a kind - A spectacular crimson red crystal of "Rubellite" Tourmaline
liberally coated with a scattering of lilac, platy Lepidolite Mica crystals
from the famous Jonas mine (João Pinto mine), Conselheiro Pena,
Minas Gerais, Brazil.

Another great Tourmaline - not Elbaite but Liddicoatite from the classic
Anjanabonoina pegmatites, Betafo District, Vakinankaratra Region,
Antananarivo Province, Madagascar.

A rich aggregate of interlocking Chrysoberyl Var. "Alexandrite" from
the Novello Mine, Masvingo (Fort Victoria), Masvingo, Zimbabwe.

 A beautiful group of two intergrown "Morganite" / "Aquamarine" crystals
showing high surface lustre
- a must for any gem mineral specimen collector.
This great specimen is from renowned Urucum claim,
Galiléia, Minas Gerais, Brazil.

Another Beryl, this time a rich green, well defined "Emerald" crystal embedded in matrix,
some of which is Calcite, from Coscuez Mine, Mun. de Muzo, Vasquez-Yacopí Mining District,
Boyacá Department, Colombia.

A rich cluster of bottle-green interlocking disc-like crystals of Uvite Tourmaline
in association with clear to white blocky Rhomboid crystals of Magnesite from 
Serra das Éguas, Brumado (Bom Jesus dos Meiras), Bahia, Brazil.

Dark green sub-parallel grown Tourmaline crystals with pale pinkish terminations, delicately held
together with pure white "flowers" of Albite Var. "Cleavelandite"
From the well know Asian locality - Stak Nala, Haramosh Mts., Skardu District,
Baltistan, Gilgit-Baltistan (Northern Areas), Pakistan.

Another specimen for the gem collector - a small group of sapphire blue triangular
crystals of Benitoite crystals together with a well developed black terminated,
prismatic crystal of Neptunite from the Dallas Gem Mine, San Benito River headwaters area,
New Idria District, Diablo Range, San Benito Co., California, USA.

Now a couple of superb Gold specimens...

A rich filigree of fine and delicate intergrowths - Native Gold perched upon matrix 
 - from Round Mountain Gold Mine, Toquima Range, Nye Co., Nevada, USA.

This beautifully crystallised Gold specimen is from the classic
Eagle's Nest Mine, Sage Hill, Michigan Bluff District, Placer Co., California, USA.

From Peru, a particularly large and well defined crystal of Tetrahedrite sits perched
amidst a cluster of pure white to colourless pointed crystals of Quartz.
Huayllapon Mine, Pasto Bueno, Pampas District, Pallasca Province, Ancash Department, Peru.

Inky cobalt blue cubes of Fluorite richly cover part of a pure white quartz bed matrix
from the Blanchard Mine, Bingham, Hansonburg District, Socorro Co., New Mexico, USA.

A rich bed of fine white to clear neddle quartz crystals is invested throughout with
a scattering of rose coloured Rhodochrosites
and lovely contrasting tiny pale blue cubes of Fluorite from
 Sweet Home Mine, Mount Bross, Alma District, Park Co., Colorado, USA.


A large Stephanite crystal from 
Fresnillo, Mun. de Fresnillo, Zacatecas, Mexico.

Three great specimens now from the
Jeffrey Mine, Asbestos, Les Sources RCM, Estrie, Québec, Canada:

First a lovely pencil point, yellowish green, lustrous Vesuvianite.
Typical habit for the Locality.

The first of two rich clusters of Chromium rich Grossular Garnet....

....and this smaller, but just as gemmy group, with a few tiny black Chromite inclusions.

Acanthite with Polybasite and Chalcopyrite
from Guanajuato, Mexico

A nice gemmy lilac coloured cluster of Manganoan Adamite crystals
from Ojuela Mine, Mapimí, Mun. de Mapimí, Durango, Mexico.

Rich blue Azurite "rosette" from 
Bisbee, Warren District, Mule Mts, Cochise Co., Arizona, USA.

Rare blue Diaboleite with Cerussite
from Mammoth-Saint Anthony Mine, Tiger, Mammoth District, Pinal Co., Arizona, USA.

Another fine Arizona piece - bright Orange Wulfenite crystals from 
Old Yuma Mine, Saguaro National Monument, Amole District, Tucson Mts, Pima Co., Arizona, USA.

Fine crystals of Chalcocite from an old collection that has bee well looked after
from Bristol, Hartford Co., Connecticut, USA.

Old Labels accompanying the Chalcocite pictured above.

A large Amblygonite Crystal from
Jenipapo district, Itinga, Minas Gerais, Brazil.

Rhodochrosite with Quartz and Pyrite from
 Sweet Home Mine, Mount Bross, Alma District, Park Co., Colorado, USA.

Another richly crystalised specimen of Azurite
from Bisbee, Warren District, Mule Mts, Cochise Co., Arizona, USA.

A rare blue, well defined crystal of Cumengeite together
with Atacamite and Anglesite from
Amelia Mine, Boleo District, Santa Rosalía, Baja California Sur, Mexico.

Paralaurionite with diaboleite and Leadhillite from
Collins vein, Mammoth-Saint Anthony Mine, Tiger, Mammoth District,
Pinal Co., Arizona, USA.

Another rarity, deep blue Clinoclase with Malachite, Azurite and Baryte
from Mammoth Mine, Mammoth, East Tintic Mts, Juab Co., Utah, USA.

Blue Veszelyite crystals scattered across Quartz matrix
from Black Pine Mine, Black Pine Ridge, John Long Mts, Philipsburg District,
Granite Co., Montana, USA.

Classic bright orange barrel shaped aggregates of Pyromorphite from
Bunker Hill Mine, Kellogg, Coeur d'Alene District, Shoshone Co., Idaho, USA

Prismatic crystals of Caledonite with Leadhillite from
Mammoth-Saint Anthony Mine, Tiger, Mammoth District,
Pinal Co., Arizona, USA.

Green bladed intergrowths of Szenicsite in matrix from 
Jardinera No. 1 Mine, Inca de Oro, Chañaral Province, Atacama Region, Chile

Blue botryoidal growths of banded Azurite showing a velvet-like surface
from the famous Copper Queen Mine,
Bisbee, Warren District, Mule Mts, Cochise Co., Arizona, USA.

An exceptional specimen of "Sceptre" Quartz on a bed of Pyrite, Quartz and bladed Siderite crystals
 the Mésage Mine, Saint-Pierre-de-Mésage, Vizille, Isère, Auvergne-Rhône-Alpes, France.

Four great classic specimens from the UK:

Yellowish orange spherical aggregates of Pyromorphite investing crevices 
of light blue Plumbogummite from Roughton Gill Mine, Caldbeck Fells, Cumbria, England, UK.

Rich blue interlocking crystals of the rare mineral Liroconite from
 Wheal Gorland, St Day United Mines, St Day, Redruth, Gwennap,
Camborne - Redruth - St Day District, Cornwall, England, UK.

Well defined silver grey "cog-wheels" of Bournonite crystals
with plated of drusy white Quartz
from Herodsfoot Mine, Lanreath, Liskeard District, Cornwall, England, UK.

Rounded deep blue Clinoclase aggregates in a cavity lined with lighter blue
Liroconite crystals from Wheal Unity, St Day United Mines,
St Day, Redruth, Gwennap, Cornwall, England, UK.

Three Classics from Germany:

A large and well preserved example of hexagonal Galena tablets
completely pseudomorphing Pyromorphite crystals
from Kautenbach Mine, Kautenbach, Traben-Trarbach,
Hunsrück, Rhineland-Palatinate, Germany.

Rose red crystals of Rhodochrosite in matrix from
Wolf Mine, Herdorf, Siegerland, Rhineland-Palatinate, Germany.

Crystals of Pyromorphite from
Mercur Mine, Bad Ems, Lahn valley, Rhineland-Palatinate, Germany.

cassiterite crystals embedded in massive Quartz
from Sauberg Mine, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany.

Also in the Crystal Classics Displays:

Dark Grey Acanthite crystals together with native Silver wires from
Hongda Mine, Xiaoqinggou Ag-Mn deposit,
Lingqiu Co., Datong Prefecture, Shanxi Province, China.

Lustrous green to yellow hexagonal plates of Mimetite
from Endeavor Mine (Elura Mine), Cobar, Robinson County,
New South Wales, Australia

Polished fossilised Belemnite preserved in Opal  from
Coober Pedy, Central North, South Australia, Australia.

Transparent, glassy Beryl Var. "Heliodor" with natural,
heavily etched crystal surfaces 
Volodarsk-Volynskii, Zhytomyr Oblast' (Zhitomir Oblast'), Ukraine.

Cobaltoan Calcite with characteristically associated Malachite from
Mashamba West Mine, Kolwezi District, Katanga Copper Crescent, 
Democratic Republic of Congo (Zaïre).

A rich example of Tsumcorite with Wulfenite and Duftite
 from the Tsumeb Mine, Tsumeb, Otjikoto Region (Oshikoto), Namibia.

A great Calcite group with Hematite emphasising the edges of some of the bladed crystals
 from the Tsumeb Mine, Tsumeb, Otjikoto Region (Oshikoto), Namibia. 

A small cluster of bright reddish orange Wulfenite crystals
  from the Tsumeb Mine, Tsumeb, Otjikoto Region (Oshikoto), Namibia.

Another Tsumeb piece. Extremely well developed Azurite crystal
partially altered to Malachite.

Leadhillite with Melanotekite and Kegelite from
Tsumeb Mine, Tsumeb, Otjikoto Region (Oshikoto), Namibia.

Brightly coloured pink Cobaltoan Dolomite
from the Tsumeb Mine, Tsumeb, Otjikoto Region (Oshikoto), Namibia.

Pale Baryte crystals partially embedded in velvety banded green Malachite.
From the Shangulowé Mine, Kambove District, Katanga Copper Crescent,
Katanga (Shaba), Democratic Republic of Congo (Zaïre).

Crimson red Rhodochrosite crystals mixed with lustrous black Manganite 
and Pyrolusite from the N'Chwaning Mines, Kuruman, 
Kalahari manganese field, Northern Cape Province, South Africa.

Dark Raspberry red aggregated groups of Talmessite resting on
a bed of Cobaltoan Dolomite from 
Bou Azzer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco.

Malachite coating complex shaped crystals of Cuprite with Quartz
from Ogonja (Onganja), Seeis, Windhoek District, Khomas Region, Namibia.

Bright lemon yellow crystals of Ettringite scattered between clusters of Calcite crystals
from the N'Chwaning Mines, Kuruman, 
Kalahari manganese field, Northern Cape Province, South Africa.

 Much of the time at the Marriott Hotel the team were busy setting up the rooms and
dealing with clients but we were able to escape to see a little of what some of the other dealers had to offer.

Across the hall from Crystal Classics was the room of Mike and Sally Bergmann
of Bergmann Minerals.
As always their collection was worth a look.
Here are a few of the things they had on display.

A fine large cut and polished slice of banded Rhodochrosite from Argentina.

A remarkable polished slice of Pallasite - Stoney Iron Meteorite
showing numerous grains of Olivine from Imillac, Chile.

 Fine but very delicate, bright orange Wulfenite crystals from
Jianshan Mine, Bayin'gholin Autonomous Prefecture,
Xinjiang Autonomous Region, China.

Beautifully reticulated form exhibited by cerussite from the well renowned 
Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia.

A delicate spray fo fine apple green terminated Apophyllite crystals perched  in
a pocket of creamy Stilbite from 
Jalgoan District, Maharashtra State, India.

Brian Kosnar had a few nice rare things again:

Of note was this Currierite (named for the Late Rock Currier).
White powdery masses with associated bright blue Lavendulan
From  the Type Locality - Torrecillas mine, Salar Grande, 
El Tamarugal Province, Tarapacá Region, Chile.

A well formed loose crystal of orange to pink Beryl var."Morganite" with a feintly
blue tinted core of "Aquamarine" from the
Urucum Pegmatite, Galiléia, Minas Gerais, Brazil.

Along the corridor was Rob Sielecki who had a fine selection of World wide items:

A great example of Celestite crystals in association  with fluorite from
the Tule Mine, Melchor Múzquiz, Mun. de Melchor Múzquiz,
Coahuila, Mexico.

Another fine example of the pink concentric growth banding in Rhodochrosite
from the Capillitas Mine, Andalgalá Department, Catamarca, Argentina.

Green stalactitite Malachite growths from
the Democratic Republic of Congo.

A closer look at the Malachite pictured above.

Edwards minerals had a collection of bothe mineral specimens and Gemstones for sale
this fine specimen of Apatite catching my eye:

Rich inky-blue hexagonal crystals of Fluorapatite scattered across a flat
matrix piece coated with white "Cleavelandite" from
the Sapo mine, Ferruginha, Conselheiro Pena, Minas Gerais, Brazil.

Some of the finely cut Gemstones on display in Edwards Minerals room inluding
Clinohumite from Tajikistan, colour change Diaspore from Turkey,
Sillimanite from Orissa, India and Amblygonite from Brazil.

A pale yellowish green cluster of tiny Demantoid Garnet crystals from the classic
Malenco Valley, Valtellina, Sondrio Province, Lombardy, Italy.

 Moving further along the corridor I found Louis Messmer of The Mineral Collective
who had a couple of great items:

Normally only seen as single units this cluster of 
purple Aragonite "cyclic" twins from
Enguidanos, Cuenca, Castile-La Mancha, Spain. was a treat for the enthusiast.

A lovely "Smoky Quartz "sceptre crystal perched on a bed
of needle Quartz and pale green Prehnite
from the Goboboseb Mts, Brandberg Area, Erongo Region, Namibia.

On Thurday while the show at the Marriott Holel was in full swing, the Crystal Classics
team was split so that we could transfer stock and start the set up at the main show at the Denver Mart.
We had reserved a lot of our stock for the showcases at this show and again the preparation began.

A view of part of the main hall at the Mart.

Cal Graeber and Leonard Himes setting up their booth.

Some of the many Exhibition show cases in the process of assembly.

Dealers cover their stand at the end of a days work.

Some of the largest Gold specimens to have been found in Australia in years gone by
(Needless to say, these are all replicas).
A display put on Penny Williamson and Paul carr of the University of Wollongong. 

One of the large Dinosaur models to be seen at the show.

 As well as the main show hall the Mart has fascility for a number of individual rooms
set out down corridors where dealers can have a more private area.
Crystal Classics had a large room down one of the corridors.

The set up went according to plan with Liz, Dave and Diana overseeing the proceedings:

Outside the booth.

The showcases arrive.

Liz and Dave - Mid preparation.

The minerals begin to fill the showcases

Visitors milling around the Crystal Classics Booth.

 A few more of the minerals in our showcases:

A classic alpine specimen Grossular Garnet crystals stacked up and in parallel growth
on a bed of Clinochlore "books" from the Ala Valley,
Lanzo Valleys, Torino Province, Piedmont, Italy.

A spectacular specimen of fine golden fibrous radiating Rutile needles
emmanating from a flat black core of Hematite in epitaxial growth
from Ibitiara, Bahia, Brazil.

A cluster of rich pink Apophylite Crystals from the Samson Mine,
St Andreasberg, St Andreasberg District, Harz, Lower Saxony, Germany.

A large specimen from the Trepča complex, Trepča valley, Kosovska Mitrovica,
District of Kosovska Mitrovica, Kosovo.
The specimen is a complex mix of Rhodochrosite together with Calcite,
Galena, Pyrite and Quartz.

A great piece from Brazil.
A large single terminated Quartz crystal with a skirt of Rose" Quartz crystals around the middle.
A fine example from Laranjeira, Minas Gerais, Brazil.

Looking around the show there were many very interesting displays - 
both from purely exhibitors wanting to show collections to dealer showcases.

 Here are some of the show cases put on by various groups at the show:

One of the many showcases - this one entitled
"Amateur Rockhounding - The First Four Years"

A closer look at the Fluorite, Baryte and Linarite specimens
from Blanchard mine, New Mexico,
shown in the case above... 

...and a selection of Amazonite with "Smoky" Quartz from Colorado.
Not bad for beginners!!

 The Western Museum of Mining and Industry had a whole series of exhibition show cases 
depicting various aspects of Gold and Silver mining:


The process of assaying the Gold included a blowpipe testing kit.

Staking your claim.

Two beautiful carvings made from minerals caught my eye:

A group of Dolphins carve dfrom a piece of Rhodochrosite from
Capillitas Mine, Andalgalá Department, Catamarca, Argentina.

Highly detailed carving of an Octopus.
Not sure What kind of stone this was carved from - perhaps a kind of Agate.

A selection of books and magazines on the "Rocks & Minerals" stand.

A selection of spectacular Indian Zeolite and related minerals
on the Superb Minerals India stand.

A fine spray of Scolecite crystals from india.

A remarkable botryoidal growth of Fluorite
also on the Superb Minerals India stand.

 Other dealers like Stonetrust had more great specimens for sale:

Polished bright blue and green Malachite and Azurite specimen
from Morenci, Copper Mountain District, Shannon Mts,
Greenlee Co., Arizona, USA.

A very clear Calcite crystal group characteristic of the
Chenzhou Prefecture, Hunan Province, China.

Pale blue terminated and striated crystal of Euclase
from La Marina Mine, Mun. de Pauna, Boyacá Department, Colombia.

One of the many collections of Thumbnails on show.

The Lizzadro Museum of Lapidary Art
put on this fine display of Cameos

A closer look at the detail in one of these cameos.

The colourful display of the Mineralogical Association of Dallas.

...Centrepiece was this fine example of Shattuckite from the
Tantara Mine, Shinkolobwe, Katanga Copper Crescent,
Dem. Rep. of Congo (Zaïre)...

...and next to it this vibrant pink specimen of Cobaltoan Calcite
with contrasting Malachite - also
from the 
Katanga Copper Crescent, Dem. Rep. of Congo (Zaïre).

This fine specimen Fluorite with Sphalerite from  
Elmwood mine, Carthage, Central Tennessee Ba-F-Pb-Zn District, 
Smith Co., Tennessee, USA was in the Rocksaholics room together with a selection of 
nice specimens that most collectors would wish to add to their collections.

Buyer Beware!
These relatively new Quartz crystal groups with great phantoms
were convincing enough, if it had not been for the green colour which was a little too rich.
The dealer who had many of these was openly selling them as man-made items grown in a laboratory 
and produced in China and very attractive they are.
The chinese I understand are passing them off as having been "heat treated" natural Quartz.

A close up of the "Phantom visible in the tip of these Quartz crystals.

 ... perhaps not so convincing.
- certainly 
we have not seen anything like this from any natural source!!
Fine needles which easily break off in your hand,
grown over a much more sturdy Phantom Quartz crystal,
but very attractive to the eye.

Gail and Jim Span had this great display of Siler and Silver
bearing minerals from around the world.

Detail of one of those Silver specimens from Germany.

To finish, I couldn't resist showing this showcase of great Tourmalines, 
all from the Himalaya Mine, Gem Hill, Mesa Grande District,
San Diego Co., California, USA

and a close up of some of those Tourmalines.

Ay, Ay. Debbie has another brush with the local law!!

Well that's it for another Denver.
We look forward to seeing all our collector and dealer friends
at the Denver show this time next year 2018.

And now we return to East coker to prepare for Munich.
This year we will have even more to show
with new collections not previously seen.
See you all there.

Author: Dave
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