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Osumilite With Tridymite

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TBM1018868

Osumilite With Tridymite

Classic Locality

Description Tabs

Description
Locality: 
Funtanafigu Quarry, Marrubiu, Oristano Province, Sardinia, Italy
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
3.5 × 5 × 4 cm
Largest Crystal: 
0.20cm
Weight: 
83.00gr
Description

Very  shiny black discoidal Osumilite crystals up to 2 mm diameter. The crystals are implanted on carpet of hexagonal packs of Tridymite crystals up to 1 mm

Mineral Data
What's on the rock

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

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

Current price

Starting price

10
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Start 27 Apr 18:00
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Shipping Information

Postage Area Price
ITALY
9.50
EUROPE ( AREA 1)
13.50
AMERICAN - UK - ASIA - AFRICA - OCEANIA ( AREA 2/3):
11