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Gitter Quartz & Hyalite On Orthoclase

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PDM939353

Gitter Quartz & Hyalite On Orthoclase

Floater

Description Tabs

Description
Locality: 
Erongo Mountains, Karibib, Erongo Region, Namibia
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.6 × 3 × 2.1 cm
Description

Gitter quartz (or Lattice quartz) is a rare form of growth. It can be confused by similar Japanese twinned quartz, but they are not. This specimen is a good representative aggregate of intergrown gitter quartz crystals, some double-terminated, that grew epitaxially in four directions out of the faces of a prismatic orthoclase crystal. One side is also richly included by dark green radial aggregates of tourmaline (?). Furthermore, the piece is partially covered by glassy transparent opal-AN hyalite of strong fluorescence under UV illumination. Floater specimen with no damages.

Acquired in 2001. Ex Peter Seroka collection #1055.

Combine specimens to reduce shipping costs!.

Mineral Data
What's on the rock

Gitter Quartz

Variety Of: 

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0

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

Orthoclase

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Hardness: 
6.0
Streak: 
White

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