Milk Opal (Porcelain 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
Cleavage
None
Fracture
Conchoidal,Splintery
Color
white
Pleochroism
Absent
Mohs Hardness
| Mohs | Reference mineral | Milk Opal (Porcelain 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 Milk Opal (Porcelain 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 Milk Opal (Porcelain Opal)
乳白蛋白石（瓷蛋白石）是一种常见的蛋白石品种，呈半透明至不透明的乳白色，具有光滑的蜡状至玻璃光泽，几乎不显示变彩，外观酷似精美瓷器，因此得名「瓷蛋白石」。乳白蛋白石由水合二氧化硅构成，颜色来源于内部光散射和微量矿物夹杂，摩氏硬度约5.5至6.5，以弧面石形式广泛用于首饰制作。重要产地遍布全球，包括澳大利亚（新南威尔士州）、墨西哥（伊达尔戈州）、秘鲁、美国（俄勒冈州）和坦桑尼亚。乳白蛋白石价格亲民，是大众宝石市场的常见品种，也是为宝石入门者所喜爱的柔美宝石。
On this page
Jewelry Use
Durability
4/10
Science FYI Family
Frequently Asked Questions
What is Milk Opal (Porcelain Opal)?
乳白蛋白石（瓷蛋白石）是一种常见的蛋白石品种，呈半透明至不透明的乳白色，具有光滑的蜡状至玻璃光泽，几乎不显示变彩，外观酷似精美瓷器，因此得名「瓷蛋白石」。乳白蛋白石由水合二氧化硅构成，颜色来源于内部光散射和微量矿物夹杂，摩氏硬度约5.5至6.5，以弧面石形式广泛用于首饰制作。重要产地遍布全球，包括澳大利亚（新南威尔士州）、墨西哥（伊达尔戈州）、秘鲁、美国（俄勒冈州）和坦桑尼亚。乳白蛋白石价格亲民，是大众宝石市场的常见品种，也是为宝石入门者所喜爱的柔美宝石。
What is the hardness of Milk Opal (Porcelain Opal)?
Milk Opal (Porcelain Opal) has a Mohs hardness of 5.5 to 6.5, making it moderate for use in jewelry.
What color is Milk Opal (Porcelain Opal)?
Milk Opal (Porcelain Opal) is primarily White.
How much does Milk Opal (Porcelain Opal) cost?
Milk Opal (Porcelain Opal) falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Milk Opal (Porcelain Opal)?
Milk Opal (Porcelain Opal) belongs to the Amorphous crystal system.