Moving mountains for you
Switch currency

Current Live Auctions

Current Live Fixed Price Sales

Nyerereite & Gregoryite

Views:
Watches:
BCK501912

Nyerereite & Gregoryite

Type Locality

Description Tabs

Description
Locality: 
Ol Doinyo Lengai, Ngorongoro District, Arusha Region, Tanzania (United Republic)
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.3 × 1 × 0.6 cm
Description

You are bidding on a small piece of volcanic material with vugs lined with tiny needles of very rare nyerereite. Also in the matrix are grey-black subhedral crystals of gregoryite. A good example of both these rare carbonate mineral. 

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

Payment options: offline, paypal_wpp, paypal_wps