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Ilvaite & Quartz

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PDM603386

Ilvaite & Quartz

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Description
Locality: 
1st Sovetskii Mine, Dalnegorsk, Primorskiy Kray, Russian Federation
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.9 × 3.5 × 2 cm
Description

This is an aesthetic combination specimen from famous mines at Dal'negorsk. The ilvaite crystals are prismatic along [001] with sharp, jet-black colour and excellent chisel-point terminations. They are combined with transparent pseudo-bipyramidal quartz crystals of a grey hue due to ilvaite inclusions.

Ex. Emile Requette specimen.

Mineral Data
What's on the rock

Ilvaite

Formula: 
CaFe2+2Fe3+(Si2O7)O(OH)
Strunz: 
9.BE.07
Crystal System: 
Monoclinic
Hardness: 
5.5 - 6.0
Type Locality: 
Torre di Rio - Santa Filomena area (Monte della Torre), Rio Marina, Elba Island, Livorno Province, Tuscany, Italy

Quartz

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

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