• Opal
  • Opal
  • Opal


$450.00   €407  £360.00 approx.  

This specimen is priced in US dollars, all other prices are approximate.

ID: CC16805
A very good specimen and example of Opal from Gunheath China Clay Pit at Stenalees in the parish of Treverbyn, near St. Austell, Cornwall.  The china clay workings are well known for their occasional occurrences of opal and this fine example is termed “Black Opal”. A roughly 6 x 3 cm area is richly impregnated with thick, highly lustrous Opal with colours ranging between black, honey-tan and opalescent milky-blue.  The specimen was collected by the late Maurice Grigg in August 1978 and is accompanied with one of his labels.


7.4 × 6.6 × 4.4 cm
Quartz and Agate
Gunheath China Clay Pit, Stenalees, St Austell, Cornwall, England, Europe

Minerals on Specimen

Minerals on specimen

Related Mineral Specimens

 Valec, Doupov, Karlovy Region, Bohemia, Czech Republic, Europe
A fine specimen of this strange bubbly form of Opal from the classic location at Valeč,...
 Cervenica, Presov Co, Presov Region, Slovakia, Europe
A fine example of Opal from the Cervenica area in Slovakia. The specimen is gemmy to translucent...
Opal Var Hyalite With Fluorapatite Var Staffelite
 Valec, Doupov, Karlovy Region, Bohemia, Czech Republic, Europe
Very characteristic bubbly vitreous ice colourless Opal variety Hyalite with Carbonate enriched...
Opal after Bivalve.
 Coober Pedy, Central North, South Australia, Australia, Oceania
A rare specimen of Opal replacing both shells of a Cretaceous bivalve from the classic Coober...