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Anthoinite & Hydrokenoelsmoreite

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Anthoinite & Hydrokenoelsmoreite

Rare Mineral

Description Tabs

Description
Locality: 
Bugarama Mine, Northern Province, Rwanda
Class: 
Massive/Crystalline
Size Range: 
Micromount (under 1cm)
Size: 
0.3 × 0.5 × 0.3 cm
Description

A tiny specimen worth a detailed description for its extremely rare association. The matrix is black ferberite pseudomorphing a scheelite crystal from this remote African pegmatite. Further alteration yielded a net-like  pattern, which is filled by powdery masses and globules of anthoinite, a very rare aluminum tungstate. The yellow, better-formed crystals show a hint of octahedral habit and are most likely hydrokenoelsmoreite, not reported from the locality but typical of W-rich associations like this.

Mineral Data
What's on the rock

Anthoinite

Formula: 
AlWO3(OH)3
Strunz: 
7.GB.35
Crystal System: 
Triclinic
Hardness: 
1.0
Streak: 
White
Type Locality: 
Mt Misobo Mine, Maniema, Democratic Republic of Congo (Zaïre)

Hydrokenoelsmoreite

Formula: 
2W2O6(H2O)
Strunz: 
4.DH.15
Hardness: 
3.0 - 0.0
Colour: 
White
Streak: 
White
Type Locality: 
Kramat Pulai Mine, Kramat Pulai, Kinta District, Perak, Malaysia

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Seller's terms and conditions

We offer rare minerals to systematic collectors worldwide, doing our best to ensure accurate identification and provide adequate information and pictures.

Through extensive field search and contacts with trusted sources, we manage to provide the best in newly found species and classic type-locality minerals. Should your item prove to be different we offer an immediate refund of purchase.

Items may be returned within 15 days of receipt, please note that return costs are at customer's expense. We will issue refund as soon as we receive the item in unaltered condition.

Preferred payment is via Paypal, please follow instructions at ceckout and make payment to: [email protected] . If you don't have a Paypal account you can as well pay with your credit card following instructions for non-Paypal users.

Alternatively we accept bank transfer to: Roberto Bracco - bank: Intesa Sanpaolo - via Paleocapa 134/R - 17100 Savona, Italy.

IBAN code: IT79P0306910600100000067863 SWIFT code: BCITITMM

Cash and checks not accepted.

To contact us and ask questions about items on sale, please e-mail to: [email protected]  - phone: +39.3381058295. Returned items should be sent to: Roberto Bracco, piazza Monticello 12/2, 17100 Savona, Italy