Moving mountains for you
Switch currency

Current Live Auctions

Current Live Fixed Price Sales

Natrolite & Gonnardite

Views:
Watches:
TPX636716

Natrolite & Gonnardite

Rare Mineral

Description Tabs

Description
Locality: 
Lugar da Nave Quarry, Nave, Monchique, Faro District, Portugal
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.1 × 6.1 × 3.3 cm
Weight: 
90.00gr
Description

Very nice Group of parallel growth crystals of natrolite partially covered by gonnardite in epitaxe, This is a good example of the mineralization of the nepheline syenite from the Monchique area.

Mineral Data
What's on the rock

Natrolite

Formula: 
Na2Al2Si3O10·2H2O
Strunz: 
9.GA.05
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Hohentwiel, Singen, Hegau, Baden-Württemberg, Germany

Gonnardite

Formula: 
(Na,Ca)2(Si,Al)5O10·3H2O
Strunz: 
9.GA.05
Hardness: 
4.0 - 5.0
Type Locality: 
La Chaux de Bergonne, Gignat, Saint-Germain-Lembron, Puy-de-Dôme, Auvergne, France

Seller Information

Payment options: offline, paypal_wpp, paypal_wps