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Dawsonite

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RSG1162343

Description Tabs

Description
Locality: 
Limoncino, Valle Benedetta, Livorno Province, Tuscany, Italy
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
0.8 × 1.7 × 1.5 cm
Description

Outstanding specimen of dawsonite from the Limoncino locality, Italy, displaying superb spherical aggregates with a perfectly radial fibrous structure, ranging from snowy white to delicate pastel pink. The crystals form fluffy hemispherical balls and rosette-like clusters composed of extremely fine acicular needles arranged in a radiating pattern, giving the specimen a silky, cotton-like appearance of remarkable delicacy.

The dawsonite lines cavities within a light siliceous–carbonate matrix locally stained by iron oxides and greenish clay minerals, producing a subtle contrast between lilac, milky white, and beige-ochre tones. Such color variations, from translucent pale pink to pure white, are characteristic of the Limoncino occurrence, which is regarded as one of the most aesthetic worldwide for this rare species.

In a box 2.8x2.8cm, labelled

FoV : 2.8mm

Mineral Data
What's on the rock

Dawsonite

Formula: 
NaAlCO3(OH)2
Strunz: 
5.BB.10
Crystal System: 
Orthorhombic
Hardness: 
3.0
Streak: 
White
Type Locality: 
McGill University campus, Montréal, Québec, Canada

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€8
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€10
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Seller Information

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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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