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Fluornatrocoulsellite & Mimetite

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SMM743843

Fluornatrocoulsellite & Mimetite

Classic Locality
Rare Mineral

Description Tabs

Description
Locality: 
Monte Somma, Vesuvius, Campania, Italy
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 2.5 × 1.5 cm
Description

Rich specimen with bipyramidal colorless crystals of rare fluornatrocoulsellite that cover various areas of the volcanic matrix, sometimes in dense carpet, groups and clusters. There are also, yellow, silky, needles of mimetite From the Vesuvius eruption of the 1944. Very good sample. Analyzed.

Boxed with Label
Mineral Data
What's on the rock

Fluornatrocoulsellite

Formula: 
(Na1.5Ca0.5)(Mg1.5Al0.5)F6F
Group Parent: 
Pyrochlore Supergroup
Strunz: 
3.00.
Crystal System: 
Trigonal
Type Locality: 
Mt Cleveland Mine, Luina, Heazlewood district, Tasmania, Australia

Mimetite

Formula: 
Pb5(AsO4)3Cl
Strunz: 
8.BN.05
Crystal System: 
Hexagonal
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Treue Freundschaft Mine, Johanngeorgenstadt, Johanngeorgenstadt District, Erzgebirge, Saxony, Germany

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