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Libyan Desert Glass With Cristobalite Inclusions

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HAN917200

Libyan Desert Glass With Cristobalite Inclusions

Rare Mineral

Description Tabs

Description
Locality: 
Great Sand Sea, Western Desert, Giza, Egypt
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
1.5 × 1.3 × 0.4 cm
Weight: 
0.70gr
Description

 translucent yellow/green specimen of Libyan Deser Glass ( LDG) with cristobalite inclusions .... weathered surface /dimples. Libyan Desert glass is an impactite, made mostly of lechatelierite, found in areas in the eastern Sahara, in the deserts of eastern Libya and western Egypt. The origin of desert glass is uncertain,  Some geologists associate the glass with radiative melting from meteoric large aerial bursts, making it analogous to trinitite created from sand exposed to the thermal radiation of a nuclear explosion. Libyan Desert glass has been dated as having formed about 29 million years ago. Like obsidian, it was knapped and used to make tools during the Pleistocene

Mineral Data
What's on the rock

Cristobalite

Formula: 
SiO2
Strunz: 
4.DA.15
Crystal System: 
Tetragonal - Trapezohedral
Hardness: 
6.0 - 7.0
Streak: 
White
Type Locality: 
Cerro San Cristóbal, Mun. de Pachuca, Hidalgo, Mexico

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Start 17 Jun 18:00
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Priority Insured mail up to 500 grams 10 Euro
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After a sale we expect to receive the payment with Pay Pal within 48 hours. You can return the goods within 14 days of receiving them by registered priority mail with tracking number. Buyer pays the costs of the return shipping 

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