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Naujakasite & Villiaumite

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RSL604792

Naujakasite & Villiaumite

Rare Mineral

Description Tabs

Description
Locality: 
Kvanefjeld, Ilímaussaq, Narsaq, Kujalleq, Greenland
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.2 × 3 × 2 cm
Largest Crystal: 
0.15cm
Description

This specimen shoews well formed, greenish to greyish, translucent naujakasite crystals in the matrix. It is accompanied by red villiaumite crystals. This specimens were collected on the dumps coming from the Kvanefjeld tunnel.

Mineral Data
What's on the rock

Naujakasite

Formula: 
(Na,K)6(Fe2+,Mn2+,Ca)(Al,Fe)4Si8O26
Strunz: 
9.EG.10
Hardness: 
2.0 - 3.0
Type Locality: 
Naujakasik (Naajakasik), Tunulliarfik Fjord (Tunugdliarfik), Ilímaussaq complex, Narsaq, Kujalleq, Greenland

Villiaumite

Formula: 
NaF
Strunz: 
3.AA.20
Crystal System: 
Isometric
Hardness: 
2.0 - 2.5
Streak: 
White
Type Locality: 
Rouma Island (Roume Island; Roma Island; Ruma Island), Los Archipelago (Los Islands), Guinea