A Geological Icon



Recognized by The Guinness Book of Records (1992) as the World’s Largest Polished Opal, Galaxy remains unmatched. Originally a 5,205-carat rough, it was expertly sculpted by master cutter Scott Cooley into a free-form, double-sided, gem-quality specimen—an extremely rare feat at this size.

{ 5-1/2 x 4 x 1-5/8 inches }



Bob Kammerling of Gems & Gemology (GIA) described Galaxy as:

“An exceptionally gem-quality opal… with complete pinfire play-of-color… gemmy throughout.”

Color, Fire, and Presence

Galaxy displays:

• Broad flashes of orange-red, lime-green, and indigo-violet
• Golden spectral highlights
• Blue-green pinfire and “fire-in-snow” effects on the reverse
• Harlequin flashes from side angles
• Continuous color-play on both faces—almost unheard of at this scale

Its heft and tactile presence make it a specimen that must be held to be understood.

{ 1 pound, 10 ounces }

Born in Brazil, Built for Eternity

Extracted by hand in Piauí, Brazil, Galaxy’s low water content (5.7%) gives it superior stability and durability—comparable to the best Coober Pedy opals, but far rarer in size and quality.

Documented & Celebrated

Featured in:

• GIA Certificate #3911162
• Gems & Gemology (1990)
• JCK (1991)
• Jewellery News Asia (1991)
• Guinness Book of Records (1992)
• American Opal Society (2011)

A Once-in-a-Lifetime Acquisition

Galaxy is Brazil’s geological mic-drop—a natural artwork

that elevates any museum or world-class private collection.

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Private Viewing Available

Steven Sodokoff — Fourth-Generation Rare Gem Specialist

📞 (415) 710-5520

✉️ Steven@Sodokoff.com

Available for acquisition.

Not an offer. An event.