6855.00 ct Natural Rough Black Opal – Untreated, Ethiopia Origin, GFCO Certified

Product Description:
An extraordinary gemstone specimen, this 6,855 carat natural rough black opal from Ethiopia showcases a striking black body tone with vivid play-of-color—a rare natural phenomenon that makes opals among the most sought-after gemstones in the world. Its massive size, unique shape (192.10 × 86.30 × 83.55 mm), and untreated condition make it an exceptional piece for collectors, museums, or high-end lapidary work.

Certified by GFCO Gemological Laboratory (Switzerland), this opal is confirmed to be 100% natural and free from any treatments, preserving its authenticity and investment value. Whether left as a display specimen or cut into multiple high-quality gems, its sheer scale and vibrant color flashes make it a one-of-a-kind treasure.

Details:

Gemstone: Natural Black Opal

Weight: 6,855.00 carats

Shape: Rough

Color: Black with Play-of-Color (Daylight)

Dimensions: 192.10 × 86.30 × 83.55 mm

Treatment: None (Untreated)

Origin: Ethiopia

Certification: GFCO Gemological Laboratory (Switzerland)

A once-in-a-lifetime acquisition for serious collectors, gemstone investors, or institutions seeking a showpiece of monumental beauty.