Wood 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
Cleavage
None
Color
white
Mohs Hardness
| Mohs | Reference mineral | Wood Opal |
|---|---|---|
| 1 | Talc | |
| 2 | Gypsum | |
| 3 | Calcite | |
| 4 | Fluorite | |
| 5 | Apatite | |
| 6 | Orthoclase | ● |
| 7 | Quartz | |
| 8 | Topaz | |
| 9 | Corundum | |
| 10 | Diamond |
Value & Market
Price Tier
Budget (< $50/ct)
Where to Buy Wood 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 Wood Opal
ウッドオパールは珪化木の一形態で、元の有機物質が二酸化ケイ素（オパール）に完全に置換されることで形成されます。木の年輪・繊維・節などの元の木質組織の細部を保持しつつ、白色・褐色・または乳白色のオパールとなっています。プレイオブカラーを示す例（プレシャスウッドオパール）もありますが、多くは遊色を持たない普通オパールです。独特の木目模様が工芸品や彫刻素材として人気があります。
On this page
Jewelry Use
Durability
4/10
Science FYI Family
Frequently Asked Questions
What is Wood Opal?
ウッドオパールは珪化木の一形態で、元の有機物質が二酸化ケイ素（オパール）に完全に置換されることで形成されます。木の年輪・繊維・節などの元の木質組織の細部を保持しつつ、白色・褐色・または乳白色のオパールとなっています。プレイオブカラーを示す例（プレシャスウッドオパール）もありますが、多くは遊色を持たない普通オパールです。独特の木目模様が工芸品や彫刻素材として人気があります。
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.