Wood Opal

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Physical & Optical Properties

Mohs Hardness 5,5 – 6,5
Specific Gravity 1,98 – 2,5
Refractive Index 1,37 – 1,52
Cleavage None
Color white

Mohs Hardness

Mohs Hardness: 5,5 – 6,5
1 Soft10 Hard

Value & Market

Price Tier Budget (< $50/ct)

About Wood Opal

Wood Opal is a form of petrified wood in which the original organic material has been replaced by opal (hydrated silica), preserving the cellular structure of the original wood in stunning detail while producing a gemstone that can display both the texture of wood grain and, in the finest specimens, a play of color. Opalescent petrified wood is found in Nevada, Idaho, and Oregon, USA, as well as in Australia and Indonesia, and is fashioned into unique cabochons and decorative pieces.

Jewelry Use

Durability 4/10

Science FYI Family

Frequently Asked Questions

What is Wood Opal?
Wood Opal is a form of petrified wood in which the original organic material has been replaced by opal (hydrated silica), preserving the cellular structure of the original wood in stunning detail while producing a gemstone that can display both the texture of wood grain and, in the finest specimens,
What is the hardness of Wood Opal?
Wood Opal has a Mohs hardness of 5.5 to 6.5, making it moderate for use in jewelry.
What color is Wood Opal?
Wood Opal is primarily White.
How much does Wood Opal cost?
Wood Opal falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
How do you care for Wood Opal?
Wood Opal is moderately durable and best suited for earrings, pendants, and brooches. Avoid ultrasonic cleaners and harsh chemicals.

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