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Quartz On Calcite

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JWK742833

Quartz On Calcite

Cristosud
New Discovery

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Description Tabs

Description
Locality: 
Allos, Alpes-de-Haute-Provence, Provence-Alpes-Cote d'Azur, France
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
13 × 10 × 4.5 cm
Weight: 
409.00gr
Description

Two fensterquartz crystals on a lenticular calcite coated matrix associated with numerous fine faden quartz lying on the calcites like small fallen trees.

That type of crystallization is very distinctive throughout the Alps : it features outstanding crystallization gaps creating hollows inside the crystal. These are then filled both with solid (clays, oxides) and fluid inclusions (carbonaceous gaz, aqueous liquids or oils) dating back to the quartz formation, in which it is now forever trapped and preserved.

Current knowledge tends to suggest fensterquartz from Allos crystallized prior to the Alps formation, more than 70 million years ago. Subsequent alpine tectonics fractured the crystals to some extent and they eventually healed to form complete clusters.

Cristosud's find.

Collected: 
2017
Mineral Data
What's on the rock

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

Calcite

Polymorph of: 
Aragonite and Vaterite
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Seller's terms and conditions

The Cristosud team wishes to offer you the best service. In order to have your parcel shipped as soon as possible, please complete the payment within the 7 days following the purchase date. In cases you want to combine several specimens and save on shipping fees, or you encounter an issue completing the payment, please let us know by emailing us, so we can arrange it together.

We accept returns within 14 days after you received the item, in accordance with the French law. Return fees are at the expense of the buyer, except if you receive a damaged specimen, or an item different from what the description stated.

Do not hesitate to email us if you need more info about a specimen you plan to bid on.

Thanks for your confidence !

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