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Orlymanite Gonyerite & Gyrolite With Calcite

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SSM720198

Orlymanite Gonyerite & Gyrolite With Calcite

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Description
Locality: 
Wessels Mine, Hotazel, Kalahari, Northern Cape Province, South Africa
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.9 × 4.9 × 3.1 cm
Weight: 
71.78gr
Description

The black coated, brown radiating spheroids has been  XRD analyzed as a closely inter-growth of orlymanite, gonyerite and gyrolite. It was also noted that gyrolite does not appear to have been reported from KMF previously. The associated calcite fluoresces under shortwave ultraviolet light. Wessels mine is the type locality for Orlymanite. This can be considered an extremely rare specimen. 

Mineral Data
What's on the rock

Orlymanite

Formula: 
Ca4Mn3Si8O20(OH)6·2H2O
Strunz: 
9.EE.30
Crystal System: 
Trigonal
Hardness: 
4.0 - 5.0
Type Locality: 
Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese field, Northern Cape Province, South Africa...

Gonyerite

Formula: 
(Mn2+,Mg)5Fe3+(Fe3+Si3O10)(OH)8
Strunz: 
9.EC.55
Hardness: 
2.5
Type Locality: 
Långban, Filipstad, Värmland, Sweden

Gyrolite

Formula: 
NaCa16Si23AlO60(OH)8·14H2O
Strunz: 
9.EE.30
Hardness: 
2.5
Streak: 
White
Type Locality: 
The Storr, Portree, Trotternish, Isle of Skye, North West Highlands (Inverness-shire), Scotland, UK

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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