Moving mountains for you
Switch currency

Current Live Auctions

Current Live Fixed Price Sales

Harmotome & Calcite

Views:
Watches:
RSL755436

Harmotome & Calcite

Classic Locality

Description Tabs

Description
Locality: 
Bellsgrove Quarry, Strontian, Highland, Scotland, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 4.3 × 2.7 cm
Largest Crystal: 
0.90cm
Description

This locality has produced some excellent specimens of this rare zeolite species. Crystals are very sharp and lustrous with perfect monoclinic forms and range from transparent to translucent. Associated with calcite.

Mineral Data
What's on the rock

Harmotome

Formula: 
(Ba0.5,Ca0.5,K,Na)5[Al5Si11O32] ·12H2O
Strunz: 
9.GC.10
Crystal System: 
Monoclinic
Hardness: 
4.0 - 5.0
Streak: 
White
Type Locality: 
St Andreasberg, St Andreasberg District, Harz, Lower Saxony, Germany

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White