Astro West Fine Minerals

Fire Opal

$1,250 $2,500


Opal is composed of hydrated silica. It is an amorphous silicate, meaning it does not form crystals. Opals are structurally composed of tiny spheres of silica which, when arranged in perfect geometry, create the famous play of color associated with the stones. The symmetrical arrangement of silica balls acts like a prism, which allows the rainbow spectrum of colors to be visible to the naked eye.

Fire opal is a transparent to translucent opal with warm body colors of yellow to orange to red. Although it does not usually show any play of color, occasionally a stone will exhibit bright green flashes. The most famous source of fire opals in Mexico is in the state of Queretaro; these opals are commonly called Mexican fire opals. Fire opals that do not show a play of color are sometimes referred to as jelly opals.

Cantera opal is a gemstone formed from rhyolite, which is a kind of igneous rock. When magma cools on the Earth's surface, traces of gas and steam escape from the stone, leaving cavities. Eventually, opal forms within these volcanic rock cavities, creating what we know as Cantera opal.

Dimensions: L 3cm × W 3.5cm × H 1.5cm

Weight: 102 cts

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- We believe you will be satisfied with your purchase or we’ll refund your purchase price in full upon safe return of the specimen in original condition within two weeks.
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- All refunds are processed within two weeks from the date when the specimen was received back. If it is a result of damage on arrival, refund may be delayed based on insurance claims.
- If your item arrives damaged, please contact us and we will resolve everything at your convenience. But DOA (Damage On Arrival) must be reported within one business day from the delivery date, no exceptions.
- All returned items must be sent back in original packaging accompanied by packing slip.

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