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Reevesite

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RSG1163601

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Description
Locality: 
Berceto, Parma Province, Emilia-Romagna, Italy
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.2 × 2 × 2.5 cm
Description

Outstanding micromount of reevesite from Berceto, Rio Barbor valley, Emilia-Romagna, Italy, showing an attractive association of tiny dark euhedral crystals, likely Magnetite, scattered over a fine-grained pale matrix. At the center, a delicate spray of yellow-green acicular reevesite crystals forms a well-defined radiating cluster.

The reevesite crystals display a silky to slightly vitreous luster, with very slender, elongated habits and sharp terminations, typical of this rare nickel-iron hydroxide species. Their vivid yellow-green color contrasts strikingly with the whitish matrix and the lustrous black microcrystals, producing a highly aesthetic micro-composition.

Reevesite is an uncommon mineral, characteristic of oxidation zones in ultrabasic and nickel-bearing deposits. The Berceto locality is well known for yielding well-crystallized microscopic specimens of high scientific and collector interest. A fine example combining rarity, crystallographic quality, and strong visual appeal, perfectly suited for advanced micromineral collections.

In a box 2.8x2.8cm, labelled

FoV : 2.2mm

Mineral Data
What's on the rock

Reevesite

Formula: 
Ni6Fe3+2(OH)16(CO3)·4H2O
Strunz: 
5.DA.50
Hardness: 
2.0
Type Locality: 
Wolfe Creek meteorite crater, Halls Creek Shire, Western Australia, Australia

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Start 28 Jan 18:00
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