opal var. Hyalit – Valec, Doupov, Karlovy Vary, Czech Republic
Found 1999
 
Sculptural Hyalite on matrix. This mineral usually occurs as a crust, the spherical crystals rarely build up to 13 mm and form an extremely aesthetic crown.
This variation of the opal is highly fluorescent. Unharmed, rare collectible from the Czech Republic with a good lustre.