Hyalite, Staffelite

Item number: MIN0222

Price: EUR 16.00 

Glass clean, colorless bubbly hyalite (variety of opal) accompany with white botryoidal Staffelite (variety of Calcium-rich Fluorapatite) grown on the top of Rhyolitic tuff. The hyalite is slighly chipped on the top.  From classic location in Valeč, Doupov Mts., the Czech Republic.  Collected in 1982 when the locality used to be a strong guarded military zone.

Format 70 (the sample fits or fills up the box of 37x37x18 mm. Sample might be little higher)
Size 30x30x15 mm
Crystal size (max.) 30 mm
Weight 11,3 g
Locality Valeč, Doupovské Hory Mts., Czech Republic