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Tridymite & Osumilite

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WAT596550

Tridymite & Osumilite

Description Tabs

Description
Locality: 
Funtanafigu Quarry, Marrubiu, Oristano Province, Sardinia, Italy
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
9 × 7.5 × 3 cm
Weight: 
312.00gr
Description

Fine black/blue osumilite on white tridymite.

This fine specimen from the Funtanafigu quarry gives a nice contrast between the two minerals. A part of the matrix is covert in small shiny tridymite crystals on which a large number of very nice osumilite crystals have fromed, they have a pleasing luster, a descent size and black-blue color.

a fine piece from this italian locality best known for it´s osumilite

Mineral Data
What's on the rock

Tridymite

Formula: 
SiO2
Strunz: 
4.DA.10
Crystal System: 
Triclinic - Pedial
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Cerro San Cristóbal, Mun. de Pachuca, Hidalgo, Mexico

Osumilite

Formula: 
(K,Na)(Fe2+,Mg)2(Al,Fe3+)3(Si,Al)12O30
Strunz: 
9.CM.05
Hardness: 
5.0 - 6.0
Colour: 
Blue
Type Locality: 
Sakkabira, Osumi Peninsula, Kagoshima Prefecture, Kyushu Region, Japan
Watto's Findings

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Seller's terms and conditions

First of all thank you for visiting my selling page and your interest in my available specimens.

as for terms and conditions, a lot is possible: communication is key...

Please send me your questions and I'll answer them as good as I'm able to.
combined shipping is no problem at all, I can fill most boxes up to 2kg before they will get to another shipping level and cost. 

in short just contact me and we'll find a way that works for the both of us.

cheers
erik

Watto's-findings