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Nyerereite & Gregoryite

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BCK616249

Nyerereite & Gregoryite

Type Locality

Description Tabs

Description
Locality: 
Ol Doinyo Lengai, Ngorongoro District, Arusha Region, Tanzania (United Republic)
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.7 × 0.4 × 0.3 cm
Description

You are bidding on two samples with grey, glassy grains of gregoryite cemented by white fibers of nyerereite. There are some vugs with nice sprays of nyerereite. Type locality for both rare species!

Mineral Data
What's on the rock

Nyerereite

Formula: 
Na2Ca(CO3)2
Strunz: 
5.AC.10
Hardness: 
0.0
Type Locality: 
Mt Oldoinyo Lengai (Ol Doinyo Lengai), Arusha Region, Tanzania

Gregoryite

Formula: 
(Na2,K2,Ca)CO3
Strunz: 
5.AA.10
Crystal System: 
Hexagonal
Hardness: 
0.0
Type Locality: 
Mt Oldoinyo Lengai (Ol Doinyo Lengai), Arusha Region, Tanzania

Seller Information

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