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Ambrinoite & Orpiment

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RSG1162348

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Description
Locality: 
Signols Quarry, Signols, Oulx, Torino Province, Piedmont, Italy
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.5 × 2.5 × 2.4 cm
Description

Outstanding micromineral specimen featuring a vivid scarlet-red lamellar crystal of ambrinoite embedded in a pale, saccharoidal matrix, accompanied by greenish-yellow patches attributable to orpiment. Ambrinoite, an extremely rare arsenic sulfosalt, is represented here by well-individualized flakes showing strong subadamantine luster and striking color contrast against the translucent host and the surrounding orpiment.

The sharp crystal definition, exceptional color saturation and typical arsenic-rich paragenesis give this specimen both high scientific relevance and strong aesthetic appeal. The Signols locality (Italy) is known among specialists for yielding rare secondary arsenic minerals formed in late-stage, low-temperature hydrothermal environments.

In a box 2.8x2.8cm, labelled

FoV : 2.8mm

Mineral Data
What's on the rock

Ambrinoite

Formula: 
[K,(NH4)]2(As,Sb)6(Sb,As)2S13·H2O
Strunz: 
2.HE.10
Hardness: 
0.0
Streak: 
Red
Type Locality: 
Signols Quarries, Signols, Oulx, Susa Valley, Torino Province, Piedmont, Italy

Orpiment

Formula: 
As2S3
Strunz: 
2.FA.30
Crystal System: 
Monoclinic
Hardness: 
1.5 - 2.0

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€6
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€8
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€10
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Shipping about 4 to 7 working days (I'am in général waiting for the next auction to end in case you want to bid on the next one)

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Seller Information

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Seller's terms and conditions

No refund on the items

When you win an auction, please pay within the end of the month of the auction. If you have not paid by the end of this selling period the item will be relisted or a litigation will be open.

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