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Hellandite-(Y)

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SER512021

Hellandite-(Y)

Rare Mineral

Description Tabs

Description
Locality: 
Seula Mine, Mount Camoscio, Verbano-Cusio-Ossola Province, Piedmont, Italy
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.6 × 2 × 1.2 cm
Description

A group of large (for the specie), white hellandite Y crystals on quartz and albite

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