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Ethiopian Black Opal, Cabochon, 16.25 ct (Specimen), Stayish mine - VIDEO

Ethiopian Black Opal, Cabochon, 16.25 ct (Specimen)

$4,950

This polished black opal is from the recently discovered deposit at Stayish mine near the town of Gashena. We source rough opals and cut and polish custom-made cabochons for jewelry companies and collectors.

External reference: GIA: New Deposit of Black Opal from Ethiopia, 2014.

Lot ID

OP-ET-P-20

Gem type

Black opal – non-hydrophane (does not absorb water)

State

Polished

Pieces

1

Weight

16.25 ct

Shape(s)

Cabochon

Length / width / depth

22.82 mm / 16.45 mm / 7.78 mm

Body tone

N1 (N1 – N4 are the black body tone types)

Brightness

1 (1 = brightest, 7= dullest)

Treatment

No treatment, 100% natural

Origin

Wollo, Ethiopia

References

GIA: New Deposit of Black Opal from Ethiopia, 2014

DEPOSIT CHARACTERISTICS

1. Black opal is found at the contact zone / stratum between volcanic rock and an underlying clay-rich layer;
2. This opal-bearing layer is contained in a single stratum and extends for c. 10-50 km along the mountain belt;
3. The black opal yielded is non-hydrophane and does not absorb water;
4. Extracted material generally comes as nodules and chunks that are 2–5 cm long; and
5. The colour patterns include: harlequin, patchwork, honeycomb etc..

BLACK OPAL DEPOSIT LOCATION

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