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Gyrolite & Prehnite

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FNW86439

Gyrolite & Prehnite

Description Tabs

Description
Locality: 
Malad Quarry, Mumbai, Maharashtra, India
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.1 × 6 × 3 cm
Description

Complete green gyrolite spheres on matrix with colourless prehnite balls.

The mineral at the top of the piece (pictures 4 & 5) is not identified, sorry.

Mineral Data
What's on the rock

Gyrolite

Formula: 
NaCa16Si23AlO60(OH)8·14H2O
Strunz: 
9.EE.30
Hardness: 
2.5
Streak: 
White
Type Locality: 
The Storr, Portree, Trotternish, Isle of Skye, North West Highlands (Inverness-shire), Scotland, UK

Prehnite

Formula: 
Ca2Al2Si3O10(OH)2
Strunz: 
9.DP.20
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Karoo dolerites, Cradock, Chris Hani District, Eastern Cape Province, South Africa
Fine Minerals World