Rare Huge Green-blue Opal Found in Nevada

The Roebling Opal's formation is attributed to silica-rich water that filled voids left behind by decaying tree limbs. This process resulted in the opal taking on the shape of the original tree parts, adding to its allure and rarity. While opals from this region are generally not used in jewelry due to their tendency to crack, the Roebling Opal stands as a testament to its exceptional quality and resilience.

Although extremely beautiful, opal from this locality is not commonly used in jewelry because it tends to craize, or crack. Opals with a vivid play-of-color and a black or other dark body color are called black opals. The Roebling Opal is a black opal with flashes of blue and green play-of-color.

Rare Huge Green-blue Opal Found in Nevada. Image credit: Chip Clark

Discovery and Journey to the Smithsonian

The opal's journey to the Smithsonian began with its discovery by miners working in the Rainbow Ridge Mine. Initially, the opal's value was not recognized, and it was nearly discarded. However, a keen-eyed miner recognized its potential and brought it to the attention of the mine superintendent. Realizing its significance, the superintendent arranged for the opal to be sent to New York City for examination by experts.

Upon examination, the opal's true value was revealed, and it was promptly acquired by the Tiffany & Co. jewelry firm. Tiffany & Co. exhibited the opal at the American Gem and Pearl Society's annual meeting, where it captivated the attention of John A. Roebling. Intrigued by the opal's beauty and rarity, Roebling acquired it and later donated it to the Smithsonian, ensuring its preservation and public appreciation.

Image credit: Chip Clark

Image credit: Chip Clark

See also: Dig Your Own Unique Opals From Nevada