Moving mountains for you
Switch currency

Current Live Auctions

Current Live Fixed Price Sales

Offretite

Views:
Watches:
ZLT964905

Offretite

Description Tabs

Description
Locality: 
Mehrberg, Kalenborn, Linz am Rhein, Westerwald, Rhineland-Palatinate, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
0.6 × 1.2 × 0.8 cm
Description

Group of offretite crystal aggregates composesd of lath like crystals which are sub parallel oriented to a darker center. The bundles have many cavities and show an optical effect. They are dull in in direction of the c-axis and show lustrous reflections in other directions. Some chabazite and clay minerals are also present. FOV 0.85 mm.

Mineral Data
What's on the rock

Offretite

Formula: 
KCaMgAl5Si13O36·16H2O or near
Strunz: 
9.GD.25
Hardness: 
4.0 - 4.5
Type Locality: 
Mont Semiol (Mont Semiouse; Mont Simiouse), Châtelneuf, Saint-Georges-en-Couzan, Loire, Rhône-Alpes, France

Seller Information

Payment options: offline, paypal_wpp, paypal_wps