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Guilleminite & Demesmaekerite

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AMM1051705

Guilleminite & Demesmaekerite

Ex. VANDENBERGHE Collection
Radioactive

Description Tabs

Description
Locality: 
Musonoi Mine, Kolwezi, Lualaba, DR Congo
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.4 × 2.8 × 2.4 cm
Description

Excellent specimen with two rare and well-formed minerals. The specimen is richly decorated with intensive yellow guilleminite crystals high in contrast to green malachite. In association with a deep bottle-green demesmaekerite (nearly black because of the huge crystal-aggregate) which is not (!) dehydrated. Specimen in very good condition.  

Type locality specimen for both minerals. Guilleminite is only known from four localities and demesmaekerite is only known from three localities. High quality specimen.

From the collection of Luc VANDENBERGHE, longtime mindat member and famous Belgian u-mineral collector. Specimen of a very well kept collection.

Mineral Data
What's on the rock

Guilleminite

Formula: 
Ba(UO2)3(SeO3)2(OH)4·3H2O
Strunz: 
4.JJ.10
Crystal System: 
Orthorhombic
Hardness: 
2.0 - 0.0
Type Locality: 
Musonoi Mine, Kolwezi, Kolwezi District, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)

Demesmaekerite

Formula: 
Pb2Cu5(UO2)2(SeO3)6(OH)6·2H2O
Strunz: 
4.JJ.20
Crystal System: 
Triclinic
Hardness: 
3.0 - 4.0
Type Locality: 
Musonoi Mine, Kolwezi, Kolwezi District, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)

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Starting price

$30
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Start 09 Jun 18:00
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Shipping Information

Postage Area Price
Germany (insured parcel) < 3 kg: 6 $
$6
Germany (insured parcel) > 3 kg - 10 kg: 9.50 $
$9.50
Worldwide, tracked < 1 kg: 9.50 $
$9.50
Worldwide, tracked > 1 kg up to 2 kg: 28 $
$28
European Union, tracked > 1 kg up to 2 kg: 18 $
$18

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Seller's terms and conditions

Accepted payment methods: PayPal, bank transfer.

Money back guarantee is valid until 14 days after receiving the payment. The refund will be initiated immediately upon receiving the minerals back. Due to the return time, there may be a delay in the refund. 

Bid History

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