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Demagistrisite

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Demagistrisite

New Mineral type

Description Tabs

Description
Locality: 
Cerchiara Mine, Borghetto Vara, Vara Valley, La Spezia Province, Liguria, Italy
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
0.7 × 2.6 × 2 cm
Description

Fibrous brown aggregates, partly masked by saponite, of the newly discovered mineral demagistrisite (IMA 2018-059) from never-ending Cerchiara mine. A calcium barium manganese silicate, demagistrisite is extremely rare and determination work took long time due to scarcity of available material. The name is a tribute to Leandro Demagistris, dean of 20th century collectors in Liguria and pioneer discoverer of now-classic localities.

A side note: the young Demagistris began his collecting career in 1922 during a field trip with old Arturo Issel, founder of Ligurian mineralogy and in his turn recently honored by a new mineral! (see Isselite in this very auction)

Author's material of course, and part of the holotype find. Green acicular cerchiaraite-(Mn) in association. A second find has been reported, but always in very limited amounts.

Mineral Data
What's on the rock

Demagistrisite

Formula: 
BaCa2Mn3+4(Si3O10)(Si2O7)(OH)4·3H2O
Crystal System: 
Orthorhombic
Type Locality: 
Cerchiara Mine, Borghetto Vara, Vara Valley, La Spezia Province, Liguria, Italy

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