Oxides and Hydroxides

 

280 results

Hematite var. Pencil Ore
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Hematite var. Pencil Ore

Hematite var. Pencil Ore

$200
 Furness Region, Cumbria
The variety of Hematite termed Pencil Ore from the Furness Region of Cumbria, England has a fibrous
Goethite on Quartz
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Goethite on Quartz

Goethite on Quartz

$200
 Restormel Royal Iron Mine, England
Based on the attached faded copperplate, hand written label, this is an old time Goethite on Quartz from the
Hematite and Quartz
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Hematite and Quartz

Hematite and Quartz

$550
 Florence Mine, England
A splendid small cabinet specimen of smoky double terminated Quartz crystals overlaying a bed of finely
Cuprite
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Cuprite

Cuprite

$450
 Wheal Gorland, England
An interesting specimen of micro-crystallised Cuprite which cements brecciated fragments and shards of
Libethenite on Quartz
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Libethenite on Quartz

Libethenite on Quartz

$450
 Phoenix United Mine, Cornwall
An excellent specimen of deep bottle-green Libethenite crystals richly lining shallow open vugs in a
Brookite
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Brookite

Brookite

$150
 Prenteg, Wales
At least six blades of gemmy, bronze-clove-brown Brookite nestle amongst an Alpine-style vein Quartz from its
Cassiterite
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Cassiterite

Cassiterite

$300
 St Agnes, Cornwall
A roughly 3 x 1.5 cm area of nicely crystallised Cassiterite crystals on a mid-grey killas matrix, from the
Rockbridgeite-Hentschelite var. Andrewsite
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Rockbridgeite-Hentschelite var. Andrewsite

Rockbridgeite-Hentschelite var. Andrewsite

$400
 Phoenix United Mine, Cornwall
The classic Cornish mineral Andrewsite is actually a mixture of Rockbridgeite and Hentschelite with minor
Cassiterite
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Cassiterite

Cassiterite

$350
 Wheal Primrose, Cornwall
A group of colourless acicular Quartz crystals overgrown by light biscuit-tan granular Cassiterite from Wheal
Chrysoberyl
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Chrysoberyl

Chrysoberyl

$750
 Ambatondrazaka District, Toamasina Province (Tamatave)
A beautiful acidic apple-green chevroned-array of Chrysoberyl crystals forming a flat platy specimen from the
Hematite
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Hematite

Hematite

$1,200
 Nador, Oriental Region
A highly aesthetic and unusual Hematite specimen from Nador in the Oriental Region of Morocco, also referred
Cuprite with Olivenite
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Cuprite with Olivenite

Cuprite with Olivenite

$2,000
 Tsumeb Mine, Oshikoto Region (Otjikoto Region)
A pair of magnificent, deep burgundy, octahedral Cuprite crystals, together with one partly intergrown smaller
Siderite on Hematite
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Siderite on Hematite

Siderite on Hematite

$600
 Tsumeb Mine, Oshikoto Region (Otjikoto Region)
Siderite is yet another common mineral at Tsumeb, but rare as well crystallised specimens suitable for
Limonite pseudomorph after Pyrite
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Limonite pseudomorph after Pyrite

Limonite pseudomorph after Pyrite

$500
 Tsumeb Mine, Oshikoto Region (Otjikoto Region)
A matrix-free pseudomorph of Limonite after cubic Pyrite crystals.  The larger crystal measures 3.2 x 2.7
Siderite with Goethite on Germanite
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Siderite with Goethite on Germanite

Siderite with Goethite on Germanite

$1,200
 Tsumeb Mine, Oshikoto Region (Otjikoto Region)
A quite gorgeous small display specimen of superbly crystallised Siderite richly covering lustrous black
Mottramite
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Mottramite

Mottramite

$2,500
 Tsumeb Mine, Oshikoto Region (Otjikoto Region)
A stunning cabinet display specimen composed almost entirely of Mottramite occurring as black
Cuprite
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Cuprite

Cuprite

$1,250
 Tsumeb Mine, Oshikoto Region (Otjikoto Region)
A choice, tightly clustered group of three or four intergrown gemmy claret-red Cuprite crystals on a bed of
Cuprite var. Chalcotrichite on Native Copper
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Cuprite var. Chalcotrichite on Native Copper

Cuprite var. Chalcotrichite on Native Copper

$350
 Tsumeb Mine, Oshikoto Region (Otjikoto Region)
A small curving branch of arborescent Native Copper forms crude crystals with an infilling of dense
Green Anglesite on Goethite
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Green Anglesite on Goethite

Green Anglesite on Goethite

$1,200
 MMM Mine, Australia
Green coloured Anglesite (lead sulphate) is a great rarity from the Broken Hill mines in New South Wales,
Cassiterite
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Cassiterite

Cassiterite

$180
 Geevor Mine, England
Micro, sub-mm Cassiterite crystals richly pervade a highly vuggy massive Cassiterite matrix, mixed with fine
Cassiterite
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Cassiterite

Cassiterite

$200
 Bunny Mine, England
A superb miniature of highly lustrous micro-crystals of Cassiterite densely pervading a micro-stockwork of
Hematite
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Hematite

Hematite

$750
 Egremont, Cumbria
An excellent and beautiful example of ‘Kidney Ore’ Hematite from the Egremont mining district in west Cumbria,
Cuprite with Native Copper
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Cuprite with Native Copper

Cuprite with Native Copper

$500
 Wheal Gorland, England
Beautiful cubic crystals of Cuprite intergrown with Native Copper form a porous granular cabinet specimen
Chalcoalumite, Ajoite and Brochantite on Native Copper and Cuprite
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Chalcoalumite, Ajoite and Brochantite on Native Copper and Cuprite

Chalcoalumite, Ajoite and Brochantite on Native Copper and Cuprite

$100
 New East Wheal Russell, England
A complexly mineralised miniature displaying Chalcoalumite (hydrous Al-Cu sulphate), Ajoite (hydrated
Native Copper with Cuprite
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Native Copper with Cuprite

Native Copper with Cuprite

$50
 Goonhilly Downs, England
Two flat branches of sheet Native Copper form a distorted ‘Y’-shaped specimen, one side with a reddish-bronze
Hematite and Quartz
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Hematite and Quartz

Hematite and Quartz

$550
 Florence Mine, England
A classic association of black lustrous bladed specular Hematite with slightly smoky Quartz crystals on
Hematite var. Pencil Ore
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Hematite var. Pencil Ore

Hematite var. Pencil Ore

$550
 West Cumberland Iron Ore Field, England
This specimen is an excellent example of what is termed ‘Pencil Ore’; a habit of Hematite that can be split
Cassiterite (concentrate for smelting)
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Cassiterite (concentrate for smelting)

Cassiterite (concentrate for smelting)

$100
 Cornwall, England
An interesting artefact from the heyday of Cornish mining.  A 6.5 x 1.3 cm diameter glass tube filled
Libethenite
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Libethenite

Libethenite

$300
 Wheal Phoenix, England
An excellent 2 x 1 cm patch of beautifully crystallised Libethenite crystals, each to about 0.8 mm and of a
Cassiterite
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Cassiterite

Cassiterite

$350
 St. Agnes, England
A beautiful and eye-catching group of brilliant-lustre Cassiterite crystals from the St. Agnes mining
Smithsonite on Coronadite
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Smithsonite on Coronadite

Smithsonite on Coronadite

$950
 Broken Hill Proprietary Mine, New South Wales
Translucent milky-white scalenohedral crystals of Smithsonite form a spiky dense triangular cluster on a sooty
Cassiterite with Quartz
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Cassiterite with Quartz

Cassiterite with Quartz

$4,500
 Torrington, New South Wales
This specimen of beautifully crystallised Cassiterite intergrown with colourless Quartz crystals is amazing
Bromian Chlorargyrite with Pyrolusite and Psilomelane
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Bromian Chlorargyrite with Pyrolusite and Psilomelane

Bromian Chlorargyrite with Pyrolusite and Psilomelane

$800
 Broken Hill Proprietary Mine, New South Wales
A porous and vuggy granular matrix of mid-grey mixed Pyrolusite and Psilomelane richly invested with many very
Goethite coating Cerussite after Anglesite
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Goethite coating Cerussite after Anglesite

Goethite coating Cerussite after Anglesite

$3,500
 Kintore Opencut, Australia
A beautiful, perfectly formed specimen of coal-black Goethite coating razor-sharp crystals of Cerussite
Cuprite
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Cuprite

Cuprite

$400
 Wheal Gorland, England
Cuprite crystals of up to 7 mm with a silvery-grey patina coat much of a re-cemented milky Quartz breccia vein
Cuprite
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Cuprite

Cuprite

$300
 Redruth, England
An excellent Cuprite from the mines around Redruth in south-west Cornwall.  It is likely that the
Azurite with Calcite and Malachite ps. after Cuprite
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Azurite with Calcite and Malachite ps. after Cuprite

Azurite with Calcite and Malachite ps. after Cuprite

$450
 Lavrion District Mines, Greece
Specimens from the Lavrion-Kamariza Mining District tend to be inherently aesthetic and this small miniature
Titanite
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Titanite

Titanite

$150
 Thörlbirg, Salzburg
A translucent limey-apple-green blade of Titanite, perfectly terminated and attached to a 1.2 x 1.2 x 0.7
Bindheimite ps. after Bournonite with Malachite
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Bindheimite ps. after Bournonite with Malachite

Bindheimite ps. after Bournonite with Malachite

$1,200
 Felixbau Mine, Carinthia
This specimen might be described as an ugly brute (!), but a rather beautiful ugly brute!!!  Mottled lime
Goethite with Calcite
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Goethite with Calcite

Goethite with Calcite

$850
  Pribram, Czech Republic
Goethite can sometimes deliver a big punch and this specimen lives up to this reputation!  Almost the
Calcite on Chalcedony
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Calcite on Chalcedony

Calcite on Chalcedony

$400
 Hüttenberger Erzberg, Carinthia
Pale milky-white double terminated scalenohedral Calcite crystals to about 5 mm are preferentially developed
Chalcedony epimorph after Baryte
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Chalcedony epimorph after Baryte

Chalcedony epimorph after Baryte

$500
 Hüttenberger Erzberg, Carinthia
An interesting light pale blue mass of Chalcedony riddled with epimorph cavities of sharp bladed Baryte from
Quartz var. Amethyst
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Quartz var. Amethyst

Quartz var. Amethyst

$400
 Banska Stiavnica (Schemnitz), Slovakia
A gorgeous light purple sceptered double terminated Amethyst with some very clear fenster formations with a
Hematite on Albite
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Hematite on Albite

Hematite on Albite

$1,500
 Goscheneralp, Switzerland
A true Alpine classic; A highly lustrous metallic Iron or Hematite Rose from Gösheneralp, Uri Switzerland.
Whewellite
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Whewellite

Whewellite

$900
 Schacht 38 Mine, Germany
Whewellite is a relatively rare organic mineral, a hydrated calcium oxalate.  This is a near-perfect,
Pyrolusite
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Pyrolusite

Pyrolusite

$500
 Luthersteufe Mine, Germany
Black, metallic, acicular needles of Pyrolusite to 8 mm densely cover a small matrix of massive mixed
Pyrolusite ps. after Calcite
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Pyrolusite ps. after Calcite

Pyrolusite ps. after Calcite

$450
 Ilfeld, Germany
An excellent pseudomorph of coal-black metallic Pyrolusite replacing a stack of rhombohedral Calcite crystals
Cassiterite
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Cassiterite

Cassiterite

$500
 Wheal Clarence, UK
A great example of well crystallised Cassiterite forming gemmy crystals along a cavity in a massive
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