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Natrolite & Calcite Psm Wood

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PDM1058480

Natrolite & Calcite Psm Wood

Description Tabs

Description
Locality: 
Sipi Caves, Mount Elgon, Manafwa District, Eastern Region, Uganda
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.6 × 4.6 × 3.3 cm
Weight: 
36.00gr
Description

Different branches of wood replaced by gemmy white natrolite needles and some calcite. Interestingly, some tiny dark green to black crystals (augite?) are also “pasted” to the bark, as part of the volcanic tuff that formed the matrix, showing that this uncommon natrolite-calcite fossilization is a product of a volcanic eruption.

Found in 02/2012 at the Mount Elgon (a remote locality in Uganda) by the Dutch collector Bert Biemold.

Combine specimens to reduce shipping costs!.

Mineral Data
What's on the rock

Natrolite

Formula: 
Na2Al2Si3O10·2H2O
Strunz: 
9.GA.05
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Hohentwiel, Singen, Hegau, Baden-Württemberg, Germany

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Wood

Variety Of: 

Plant

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