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Calcite & Natrolite On Natrolite Psm Fossil Wood

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RHT621007

Calcite & Natrolite On Natrolite Psm Fossil Wood

Pseudomorph

Description Tabs

Description
Locality: 
Sipi Caves, Mount Elgon, Manafwa District, Eastern Region, Uganda
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.8 × 7.4 × 2 cm
Weight: 
113.00gr
Description

A spectacular specimen with cognac-colored calcite crystals on a flat piece of fossil wood (surely bark) replaced by natrolite. Accentuted with very nice groups of shiny, colorless, acicular natrolite crystals. A highly interesting specimen of fossil wood like I've never seen from any other place. It's the only fossil replaced by natrolite I've ever heard about. Last but not least it's a very aesthetic specimen with very good crystals.

The caves have a volcanic origin (pyroclastic stream?). Last described by Udluft (1929) and Holms (British Museum 1937).

Only minor dings around the edges.

Will ship safely in an extra box with soap powder.

Mineral Data
What's on the rock

Calcite

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

Natrolite

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

Wood

Variety Of: 

Plant

Seller Information

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