Prase Opal

Q: What is Prase Opal?

Prase Opal is a green variety of common opal whose color is produced by nickel-bearing minerals, giving it a distinctive mint to grass-green appearance without the play of color seen in precious opal. It is found primarily in Tanzania and Poland, where it occurs in ultramafic and serpentinite host r

Q: What is the hardness of Prase Opal?

Prase Opal has a Mohs hardness of 5.0 to 6.5, making it moderate for use in jewelry.

Q: How much does Prase Opal cost?

Prase Opal falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.

Q: What is the crystal system of Prase Opal?

Prase Opal belongs to the Amorphous crystal system.

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Physical & Optical Properties

Category Semi-Precious Gems

Mohs Hardness 5,0 – 6,5

Specific Gravity 1,98 – 2,25

Refractive Index 1,37 – 1,47

Crystal System Amorphous

Luster Vitreous

Cleavage None

Fracture Conchoidal

Color white

Mohs Hardness

Mohs Hardness: 5,0 – 6,5

1 Soft10 Hard

Crystal System

Value & Market

Price Tier Budget (< $50/ct)

Where to Buy Prase Opal

Blue Nile Fine jewelry retailer

James Allen Gemstone jewelry

Brilliant Earth Ethically sourced gems

Amazon Wide selection

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About Prase Opal

Prase Opal is a green variety of common opal whose color is produced by nickel-bearing minerals, giving it a distinctive mint to grass-green appearance without the play of color seen in precious opal. It is found primarily in Tanzania and Poland, where it occurs in ultramafic and serpentinite host rocks. Its uniform green color and waxy luster make it a popular cabochon material for jewelry designers.