White 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
Crystal System Amorphous
Cleavage None
Fracture Conchoidal,Splintery
Color white
Pleochroism Absent

Mohs Hardness

Mohs Hardness: 5.5 – 6.5
1 Soft10 Hard

Crystal System

Value & Market

Price Tier Budget (< $50/ct)

About White Opal

White Opal is the most common type of precious opal, displaying play of color against a white to light gray or milky body tone, with spectral flashes typically appearing in pastel hues of blue, green, pink, and purple rather than the vivid fire of black opal. Australia's Coober Pedy, Lightning Ridge, and Andamooka fields produce large quantities of white opal that is widely used in jewelry and represents the classic opal known to most consumers. White opal is October's birthstone and is traditionally given on 14th and 34th wedding anniversaries.

Jewelry Use

Durability 4/10

Science FYI Family

Frequently Asked Questions

What is White Opal?
White Opal is the most common type of precious opal, displaying play of color against a white to light gray or milky body tone, with spectral flashes typically appearing in pastel hues of blue, green, pink, and purple rather than the vivid fire of black opal. Australia's Coober Pedy, Lightning Ridge
What is the hardness of White Opal?
White Opal has a Mohs hardness of 5.5 to 6.5, making it moderate for use in jewelry.
What color is White Opal?
White Opal is primarily White.
How much does White Opal cost?
White Opal falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of White Opal?
White Opal belongs to the Amorphous crystal system.

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