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Apophyllite With Stilbite

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QRI783015

Apophyllite With Stilbite

Former collection Christian Mavris
Classic Locality

Description Tabs

Description
Locality: 
Pune (Poonah), Maharashtra, India
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.9 × 6.5 × 5.4 cm
Largest Crystal: 
3.20cm
Weight: 
165.00gr
Description

Beautiful group of green apophyllite crystals on matrix. Apple green color for these apophyllites, which are associated to white stilbite bowties. These unusual elongated apophyllite crystals feature some faces as quite lustrous and smooth, and some other with a coverage of millimetric, lustrous blocky apophyllite, which provide a 'sugary' appearance. The matrix is brown to pinkish, possibly given heulandite, which further enhances the color contrast. The group is sizeable for that association, and it comes in excellent conditions.
This was part of my crystallographic suite due to the perfect habitus of the apophyllite crystals. I did acquire it at the Munich show in 2006.

Mineral Data
What's on the rock

Apophyllite

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

Hydroxyapophyllite-(K)

Formula: 
KCa4(Si8O20)(OH,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

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