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The mystery of Minerals, brought to you by {name}

Antonio Rapisarda

L'ossidiana è un vetro vulcanico la cui formazione è dovuta al rapidissimo raffreddamento della lava, sempre ricca di ioni silicato. L'ossidiana è un vetro naturale, del tutto simile a quello di produzione umana.

Materia prima molto ricercata nell'antichità per la fabbricazione di strumenti taglienti (prevalentemente coltelli) è stata una delle merci che ha animato il commercio del Mediterraneo e sostenuto la vita economica dei luoghi di estrazione. Oggi viene ancora lavorata in piccoli oggetti decorativi, monili, lame per bisturi.

Splendida sfera di ossidiana, proveniente dal Messico.

Peso: 840g
Diametro: 8,9cm

Mexico

Obsidian Sphere - Height: 8.9 cm- 840 g - (1)

Minerals & Meteorites

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today

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tomorrow

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Object

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Country of origin

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Material

Silver

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Stone

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Metal

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.925 silver

Gender

Unisex

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Condition

As new - unused

Natural

Excellent condition - barely used with minimal signs of wear

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Excellent condition: barely used with minimal signs of wear

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Very good condition - slightly used with small signs of wear

Ungraded

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Fair condition - used with visible signs of wear

Fair condition

Period

Paleogene, Eocene (56 - 33.9 million years)

2020+

2026

Neogene, Miocene (23.03 - 5.33 million years)

1990-2000

Jurassic (201.3 - 145 million years)

Paleogene (66 - 23.03 million years)

Ordovician (485.4 - 443.8 million years)

2020

1850-1900

Late 20th century

1970-1980

Paleogene, Oligocene (33.9 - 23.03 million years)

Cretaceous, Upper (100.5 - 66 million years)

Cretaceous, Lower (145 - 100.5 million years)

Neogene (23.03 - 2.58 million years)

Devonian (419.2 - 358.9 million years)

2024

2025

20th - early (WW I)

Coral

Pearl

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Lapis lazuli

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Freshwater cultured pearl

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Ruby

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Rhodolite

Akoya cultured pearl

Sapphire

Emerald

Certification

No laboratory report

GEM-TECH Istituto Gemmologico

Gem research Swiss Lab (GRS)

Antwerp Laboratory for Gemstone Testing (ALGT)

CITES Appendix II - Annex B in the EU

Style

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Minerals & Meteorites

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Obsidian Sphere - Height: 8.9 cm- 840 g - (1)

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