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Combeite

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SKY762615

Combeite

Rare Mineral

Description Tabs

Description
Locality: 
Ol Doinyo Lengai, Ngorongoro District, Arusha Region, Tanzania (United Republic)
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.7 × 1.5 cm
Description

Pale pink crystal aggregates of the very rare silicate mineral combeite from one of the only 4 localities known worldwide.

Associated minerals are wollastonite, nepheline and augite.

Mineral Data
What's on the rock

Combeite

Formula: 
Na2Ca2(Si6O18)0.5
Strunz: 
9.CJ.15a
Hardness: 
0.0
Type Locality: 
Mt Shaheru, Mt Nyiragongo, Goma, Kivu, Democratic Republic of Congo (Zaïre)

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