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Arfvedsonite & Quartz

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SMM544221

Arfvedsonite & Quartz

Description Tabs

Description
Locality: 
Sant'Antioco, South Sardinia Province, Sardinia, Italy
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2 × 0.5 cm
Description

Perfect well-finished, blacks, glossy crystals of arfvedsonite with amethyst quartz, rest on a bed of snow-white sanidine microcrystals. A very nice specimen.

Boxed with Label
Mineral Data
What's on the rock

Arfvedsonite

Formula: 
[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
Strunz: 
9.DE.25
Hardness: 
5.0 - 6.0
Type Locality: 
Kangerluarsuk Fjord (Kangerdluarssuq Fjord), Ilímaussaq complex, Narsaq, Kujalleq, Greenland

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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