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Norrishite & Sérandite

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SMM657548

Norrishite & Sérandite

Rare Mineral

Description Tabs

Description
Locality: 
Cerchiara Mine, Borghetto Vara, Vara Valley, La Spezia Province, Liguria, Italy
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1 × 1 × 0.5 cm
Description

Thin, bronze-golden tufts of acicular crystals of rare norrishite, together with glassy, colorless crystals of serandite. Nice sample.

Boxed with Label
Mineral Data
What's on the rock

Norrishite

Formula: 
KLiMn3+2(Si4O10)O2
Strunz: 
9.EC.20
Hardness: 
2.5
Type Locality: 
Hoskins mine, Grenfell, Forbes Co., New South Wales, Australia

Sérandite

Formula: 
Na(Mn2+,Ca)2(HSi3O9)
Strunz: 
9.DG.05
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Rouma Island (Roume Island; Roma Island; Ruma Island), Los Archipelago (Los Islands), Guinea

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