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Thortveitite & Polycrase-(Y)

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SER167745

Thortveitite & Polycrase-(Y)

Description Tabs

Description
Locality: 
Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.2 × 2.8 × 2.1 cm
Description

Some blue spot of thortveitite on chlorite with a large polycrase Y crystal in another vug

Mineral Data
What's on the rock

Thortveitite

Formula: 
(Sc,Y)2Si2O7
Strunz: 
9.BC.05
Crystal System: 
Monoclinic
Hardness: 
6.0 - 7.0
Streak: 
white
Type Locality: 
Ljoslandsknipan (Thortveitittgruva), Knipan (Knipane), Ljosland, Iveland, Aust-Agder, Norway

Polycrase-(Y)

Formula: 
(Y,U)(Ti,Nb)2O6
Strunz: 
4.DG.05
Hardness: 
5.0 - 6.0
Colour: 
Black
Type Locality: 
Rasvåg feldspar quarries, Hidra (Hitterø), Flekkefjord, Vest-Agder, Norway