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Hellandite-(Y)

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SMM1026937

Hellandite-(Y)

Description Tabs

Description
Locality: 
Montoso Quarries, Bagnolo Piemonte, Cuneo Province, Piedmont, Italy
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 1 × 0.6 cm
Description

A beautiful group of glassy, sharp, very pale yellow hellandite-(Y) crystals.

Boxed with Label
Mineral Data
What's on the rock

Hellandite-(Y)

Formula: 
(Ca,REE)4Y2Al(Be,Li)2-xB4Si4O22(OH)2
Strunz: 
9.DK.20
Crystal System: 
Monoclinic
Hardness: 
5.5
Type Locality: 
Lindvikskollen quarry, Lindvikskollen-Kalstadgangen pegmatite, Kragerø, Telemark, Norway

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