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Georgia Foteinou

Natural Ethiopian Rough Opal Colourfull and Cuttable Stones
Dimensions from 18mm to 20mm approx

Pictures taken with high resolution camera on different backgrounds in order to depict the opals as realistically as possible.

Worldwide shipping with registered mail and tracking number.



An opal is a hydrated form of silica with a water content ranging from 3 to 21%.Indeed, it is this permeability to water that makes it a hydrophile.
Opals are deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt. Precious opals show a variable interplay of internal colors.

At microscopic scales, precious opal is composed of silica spheres some 150 to 300 nm in diameter in a hexagonal or cubic close-packed lattice. These ordered silica spheres produce the internal colors by causing the interference and diffraction of light passing through the microstructure of the opal.



Well, Ethiopia

Cts. 38.10 Ethiopian Opal Rough Rough- 7.62 g

Minerals & Meteorites

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Material

Silver

Stone

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Shell

Malachite

Gender

Women

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Condition

As new - unused

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Period

Paleogene, Eocene (56 - 33.9 million years)

Paleogene, Oligocene (33.9 - 23.03 million years)

Neogene, Miocene (23.03 - 5.33 million years)

2020+

2010-2020

1970-1980

1980-1990

1990-2000

Cretaceous, Lower (145 - 100.5 million years)

Triassic, Lower (251.9 - 247.2 million years)

2023

2025

1850-1900

Coral

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Freshwater cultured pearl

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Certification

No laboratory report

GEM-TECH Istituto Gemmologico

Antwerp Laboratory for Gemstone Testing (ALGT)

Non-CITES species

Anchor Cert

Style

Modern

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Signature

Not signed

Colour

Green

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Cts. 38.10 Ethiopian Opal Rough Rough- 7.62 g

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