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Offretite Erionite & Lévyne

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NST679222

Offretite Erionite & Lévyne

Description Tabs

Description
Locality: 
Punta del Aguila, Playa Blanca, Yaiza, Lanzarote, Canary Islands, Spain
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.2 × 1.6 × 1.5 cm
Description

Intergrown Erionite/Offretite on tabular Levyne crystals in vuggy basaltic matrix from Lanzarote.

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

Erionite

Synonym Of: 

Erionite-Ca

Formula: 
(Ca,K2,Na2)2[Al4Si14O36]·15H2O
Strunz: 
9.GD.20
Hardness: 
3.5 - 4.0

Erionite-K

Formula: 
(K2,Ca,Na2)2[Al4Si14O36]·15H2O
Strunz: 
9.GD.20
Hardness: 
3.5 - 4.0

Erionite-Na

Formula: 
(Na2,K2,Ca)2[Al4Si14O36]·15H2O
Strunz: 
9.GD.20
Hardness: 
3.5 - 4.0

Lévyne

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