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 2.5 cm like it did in this case.
 This variation of the opal is highly fluorescent. Unharmed, lustrous, rare specimen from the Czech Republic.