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Fluorapophyllite & Stilbite

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MGR962823

Fluorapophyllite & Stilbite

Description Tabs

Description
Locality: 
Jalgoan Quarries, Maharashtra, India
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
11.7 × 6.5 × 4.3 cm
Description

Altough here is lot of quantity from India this intense saturation of fluorapophyllite is quite rare. The crystals are all razor sharp terminated, they show exceptional luster and the main crystal is very exposed. Between the apophyllite crystals you can see highly lustrous, transparent, colorlesss and thin Stilbite crystals - they are hard to identify on the images, because they are like glass. It is a really wonderful composition - the whole specimen is sparkling, all crystals are free-standing, it is much more immpressive in person and should be high ranked for color and quality.

Mineral Data
What's on the rock

Fluorapophyllite

Synonym Of: 

Fluorapophyllite-(K)

Formula: 
KCa4(Si8O20)(F,OH)·8H2O
Strunz: 
9.EA.15
Hardness: 
4.5 - 5.0

Fluorapophyllite-(Na)

Formula: 
NaCa4(Si8O20)F·8H2O
Strunz: 
9.EA.15
Hardness: 
4.0 - 5.0

Stilbite

Synonym Of: 

Stilbite-Ca

Formula: 
NaCa4[Al9Si27O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0

Stilbite-Na

Formula: 
(Na,Ca,K)6-7[Al8Si28O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0
Hardness: 
3.5 - 4
Colour: 
White
Streak: 
White