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Offretite & Lévyne

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CFL860827

Offretite & Lévyne

Description Tabs

Description
Locality: 
Adel, Lake County, Oregon, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3.2 × 2.7 cm
Description

Rich specimen of trigonal platy levyne crystals overgrown on both sides with fibrous offretite crystals.  Other unidentified species (possibly cowlesite and thomsonite-Ca) that filled some vugs.  Interestingly, on this specimen, these associated species appear to be exclusive with each other (levyne+offretite versus cowlesite and thomsonite-Ca).

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

Lévyne

Strunz: 
77.1.2.8
Hardness: 
4 - 4½
Colour: 
White
Streak: 
White

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