Common Opal
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
5.5 – 6.5
Specific Gravity
1.98 – 2.5
Refractive Index
1.37 – 1.52
Crystal System
Amorphous
Luster
Wood Opal
Cleavage
None
Fracture
Conchoidal,Splintery
Color
white
Pleochroism
Absent
Mohs Hardness
| Mohs | Reference mineral | Common Opal |
|---|---|---|
| 1 | Talc | |
| 2 | Gypsum | |
| 3 | Calcite | |
| 4 | Fluorite | |
| 5 | Apatite | |
| 6 | Orthoclase | ● |
| 7 | Quartz | |
| 8 | Topaz | |
| 9 | Corundum | |
| 10 | Diamond |
Crystal System
Value & Market
Price Tier
Budget (< $50/ct)
Where to Buy Common Opal
Blue Nile
Fine jewelry retailer
James Allen
Gemstone jewelry
Brilliant Earth
Ethically sourced gems
Amazon
Wide selection
Links may earn a commission at no extra cost to you.
About Common Opal
普通蛋白石是不具备变彩效应的蛋白石，以其多样的颜色和半透明至不透明的质地而受到宝石爱好者的关注。普通蛋白石包括绿色的果冻蛋白石（绿蛋白石）、粉红色的秘鲁蛋白石（粉蛋白石）、白色的乳白蛋白石等多种品种。虽然缺乏贵蛋白石的变彩效果，但部分品种以其清澈的颜色和独特质感备受珠宝设计师的青睐。
On this page
Jewelry Use
Durability
4/10
Science FYI Family
Frequently Asked Questions
What is Common Opal?
普通蛋白石是不具备变彩效应的蛋白石，以其多样的颜色和半透明至不透明的质地而受到宝石爱好者的关注。普通蛋白石包括绿色的果冻蛋白石（绿蛋白石）、粉红色的秘鲁蛋白石（粉蛋白石）、白色的乳白蛋白石等多种品种。虽然缺乏贵蛋白石的变彩效果，但部分品种以其清澈的颜色和独特质感备受珠宝设计师的青睐。
What is the hardness of Common Opal?
Common Opal has a Mohs hardness of 5.5 to 6.5, making it moderate for use in jewelry.
What color is Common Opal?
Common Opal is primarily White.
How much does Common Opal cost?
Common Opal falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Common Opal?
Common Opal belongs to the Amorphous crystal system.