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Opal Var Hyalite

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SKI550314

Opal Var Hyalite

Classic Locality

Description Tabs

Description
Locality: 
Hochberg Quarry, Nieder-Ofleiden, Homberg, Vogelsberg, Giessen Region, Hesse, Germany
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 9 × 0.9 cm
Description

A thin plate of whiteish aragonite with waterclear spheres and crusts of hyalite. Older specimen from a lesser known german locality, an abandoned basalt quarry located near Blofeld, about 3.5 km ENE of Reichelsheim. The basalt was mined to build the near Autobahn 45 in the 1970s, afterwards the quarry was used as a dump and is recultivated nowadays. Collected in the 1970s by H. Dilcher (a local collector) it was part of my personal collection for many years. Excellent quality for the locality of which I haven't seen many similar specimens on the market.

Mineral Data
What's on the rock

Opal

Formula: 
SiO2·nH2O
Strunz: 
4.DA.10
Hardness: 
5.5 - 6.5
Streak: 
White

Hyalite

Variety Of: 

Opal

Formula: 
SiO2·nH2O
Strunz: 
4.DA.10
Hardness: 
5.5 - 6.5
Formula: 
SiO2·nH2O
Hardness: 
5.5 - 6.5
Streak: 
white

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