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Rynersonite

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GFM616035

Rynersonite

Rare Mineral

Description Tabs

Description
Locality: 
Kårarvet, Falun, Dalarna County, Sweden
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
1 × 1.6 × 1.6 cm
Description

the rare calcium-tantalum-oxide forms dark brownish bright lustrous crystals and crystal aggregates with some feldspar matrix. Newly examined old material, collect all round 1870.

Mineral Data
What's on the rock

Rynersonite

Formula: 
Ca(Ta,Nb)2O6
Strunz: 
4.DF.05
Crystal System: 
Orthorhombic
Hardness: 
4.5
Streak: 
white
Type Locality: 
San Diego Mine (K. C. Naylor mine), Gem Hill, Mesa Grande District, San Diego Co., California, USA