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Kostylevite & Andrianovite

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CSL507054

Kostylevite & Andrianovite

IMA 2007-008
Type Locality

Description Tabs

Description
Locality: 
Koashva Mountain, Khibiny Massif, Murmansk Oblast, Russian Federation
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2.5 × 2 cm
Description

Very rare K-Zr silicate mineral kostylevite forms a group of colourless to pal pinkish crystals microcline aegirine matrix.  Andrianovite is a very rare mineral of eudialyte group. This is a complex, Zr and Nb bearing silicate mineral, forms cream coloured crystals on dark aegirine matrix. Still a one locality mineral since the approval in 2007. Great piece with good crystals.

Mineral Data
What's on the rock

Kostylevite

Formula: 
K2Zr(Si3O9)·H2O
Strunz: 
9.CJ.35
Hardness: 
5.0
Type Locality: 
Vuonnemiok River Valley, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...

Andrianovite

Formula: 
Na12(K,Sr,Ce)3Ca6Mn3Zr3Nb(Si25O73)(O,H2O,OH)5
Strunz: 
9.CO.10
Hardness: 
0.0
Type Locality: 
Koashva quarry, Koashva Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...
Loranth Minerals

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