Obsidian Rough - Height: 26 cm - Width: 20 cm- 4.59 kg - (1)

atural black obsidian – Possible origin Sardinia, Monte Arci – Large specimen weighing 4.586 kg Impressive sample of black obsidian, weighing as much as 4.586 kg, characterized by an intense black color and notable vitreous luster. The specimen presents an irregular, sculptural shape, with broad glossy surfaces, suggestive conchoidal fractures and numerous facets that create fascinating plays of light. The surface alternates between highly reflective areas and more opaque ones, highlighting the typical features of obsidian, a natural volcanic glass formed by the rapid cooling of silica-rich lava. Possible origin from Sardinia, Monte Arci area, renowned for its important obsidian deposits, known and exploited since prehistoric times. The possible Sardinian origin has been suggested by an expert, but it is not accompanied by certification or scientific analysis. The geographical provenance remains to be confirmed. Thanks to its significant dimensions, substantial weight, and distinctive form, this specimen represents an interesting object for mineral collecting as well as a striking decorative element. Features * Material: black obsidian * Weight: 4.586 grams (4.586 kg) * Color: intense black * Luster: vitreous, with highly reflective surfaces * Form: rough and irregular * Structure: conchoidal fractures and pronounced edges * Provenance: possibly Sardinia, Monte Arci, uncertified * Dimensions: see photographs with a ruler for reference A striking, scenically impressive specimen, ideal for mineral collectors, geology enthusiasts, and lovers of volcanic rocks. Auction without reserve price. The photographs are an integral part of the description and document the characteristics, surfaces, and dimensions of the specimen. The object will be carefully packaged to ensure maximum protection during shipping.

估價:$26.88

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