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Gyrolite On Quartz

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SHW589132

Gyrolite On Quartz

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Description
Locality: 
Malad Quarry, Mumbai, Maharashtra, India
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
3 × 6 × 4.5 cm
Weight: 
70.00gr
Description

Balls of greenish crystals of gyrolite on matrix of fine quartz.

Very attractive and unusual formation.

Mines in Malad, Mumbai producing top quality okenite, prehnite, gyrolite etc. are already closed since last 5-6 years due to expansion of the residential locality around. However some specimens are found in nearby area while digging the foundation for new big buildings.

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

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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