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Zircon Var Alvite

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PDM729297

Zircon Var Alvite

Classic Locality

Description Tabs

Description
Locality: 
Tangen Feldspar Mine, Kragerø, Telemark, Norway
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 3.8 × 2.3 cm
Description

Superb aggregate of brown “alvite” crystals, an Hf-rich variety of zircon. Hafnium is one of the rarest chemical elements in minerals.

Bought in April/1972; Ex. Dr. Carlos Prieto.

Mineral Data
What's on the rock

Zircon

Formula: 
ZrSiO4
Strunz: 
9.AD.30
Crystal System: 
Tetragonal
Hardness: 
7.5
Streak: 
White

Alvite

Variety Of: 

Zircon

Formula: 
ZrSiO4
Strunz: 
9.AD.30
Hardness: 
7.5
Hardness: 
0.0

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