Get to Know a Nevada Mineral: Opal

Nevada is well known for its gold and silver mining, but the state produces more than 20 minerals we use every day. Here are 5 things you may not know about one of those minerals: Opal.

It’s kind of a big deal

The Virgin Valley black fire opal was declared Nevada’s official state precious gemstone in 1987.

You won’t find it just anywhere…

Black fire opal is especially rare and only found in two areas on earth: Nevada’s Virgin Valley and New South Wales, Australia. Other types and colorations of the gemstone can be found in Nevada’s Nye and Lincoln Counties.

…But you can find it at the Smithsonian

The Roebling Opal, discovered in Humboldt County’s Virgin Valley, was donated to the Smithsonian in 1917. The 1.5 pound, 2585ct black fire opal is considered one of the museum’s most impressive specimens.

Nobody minds if you mine it

Opal is one of the few minerals the public can actively mine in Nevada, with a number of mines throughout the state open to visitors. Check the website of the mine you plan on visiting before you head out though, as each has its own seasonal schedule and fees.

That’s probably not a Nevada opal in your necklace

While most opals found throughout the world are used for jewelry, Nevada’s are prone to cracking if handled too often, making them unpopular with jewelry makers.

Want to learn more about the 20 minerals produced in Nevada? Check out our minerals page.