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Orlymanite Gonyerite & Gyrolite With Calcite

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SSM729296

Orlymanite Gonyerite & Gyrolite With Calcite

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Description Tabs

Description
Locality: 
Wessels Mine, Hotazel, Kalahari, Northern Cape Province, South Africa
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 5.9 × 3.7 cm
Weight: 
32.39gr
Description

This unusual and rare specimen of black coated, brown radiating spheroids has been XRD analyzed as a closely inter-growth of orlymanite, gonyerite and gyrolite (the rounded aggregates) associated with calcite. It was also noted that gyrolite does not appear to have been reported from the Kalahari manganese Field previously. 

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: 
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 sent via post office airmail with a tracking number. Delivery times will vary with destination and we estimate 3-4 weeks. Please note that Customs can delay the shipment and this is out of our control. Please contact us to assit 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.

Courier services are available on request. 

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

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

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