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Kristiansenite Fluorite & Stilbite

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SER817161

Kristiansenite Fluorite & Stilbite

Description Tabs

Description
Locality: 
Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 2.6 × 4.1 cm
Description

Muscovite and albite clusters host three colourless kristiansenite crystals, a good fluorite and dozens light yellow stilbite crystals

Mineral Data
What's on the rock

Kristiansenite

Formula: 
Ca2ScSn(Si2O7)(Si2O6OH)
Strunz: 
9.BC.30
Hardness: 
5.5 - 6.0
Streak: 
white
Type Locality: 
Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Stilbite

Synonym Of: 

Stilbite-Ca

Formula: 
NaCa4[Al9Si27O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0

Stilbite-Na

Formula: 
(Na,Ca,K)6-7[Al8Si28O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0
Hardness: 
3.5 - 4
Colour: 
White
Streak: 
White