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Tinzenite & Quartz

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RSL687610

Tinzenite & Quartz

Classic Locality

Description Tabs

Description
Locality: 
Molinello Mine, Ne, Graveglia Valley, Genova Province, Liguria, Italy
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 4.2 × 2.8 cm
Largest Crystal: 
0.70cm
Description

Groups of orange rosettes of this rare species. Tinzenite is a boro/aluminosilicate of calcium and manganese from the axinite group, and probably the best specimens are from this Italian mine nowadays flooded and partially collapsed. Accompanied by quartz crystals.

Mineral Data
What's on the rock

Tinzenite

Formula: 
(Ca,Mn2+)2Mn2+Al2BSi4O15(OH)
Strunz: 
9.BD.20
Crystal System: 
Triclinic - Pinacoidal
Hardness: 
6.5 - 7.0
Type Locality: 
Parsettens Alp, Tinizong (Tinzen), Oberhalbstein (Surses; Sursass), Albula Valley, Grischun (Grisons; Graubünden), Switzerland

Quartz

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