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Sturmanite & Calcite

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SSM720217

Sturmanite & Calcite

Fluorescent

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Description Tabs

Description
Locality: 
NChwaning II Mine, Kuruman, Kalahari, Northern Cape Province, South Africa
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.4 × 5.3 × 3 cm
Weight: 
112.46gr
Description

This is a lovely combination piece with yellow, perfectly clear and gemmy sturmanite crystals on matrix, associated with silver-white botryoidal calcite which fluoresces orange-red under ultraviolet light. A rare combination piece with some limited contact damage. The Kalahari Mangenese Fields is a type locality for Sturmanite. 

Mineral Data
What's on the rock

Sturmanite

Formula: 
Ca6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12·25H2O
Strunz: 
7.DG.15
Crystal System: 
Trigonal
Hardness: 
2.5
Type Locality: 
Black Rock Mine, Black Rock, Kalahari manganese field, Northern Cape Province, South Africa

Calcite

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

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Seller's terms and conditions

 

Our parcels are normally sent via post office airmail with a tracking number, however courier services are available on request.

Delivery times will vary with destination. Please note that Customs can delay the shipment and this is out of our control. Kindly contact us to assist with tracking if you are experiencing longer than expected delays. 

Please note that all of our specimens are carefully packaged and marked as fragile. As soon as it has been posted, we shall e-mail you with the tracking number of the parcel.

Insurance will be taken out only if it is the buyer's expressed wish. 

If your country has Customs and Import duty fees, it will have to be for your account.

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