Neptunite
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
5.0 – 6.0
Specific Gravity
3.19 – 3.23
Refractive Index
1.692 – 1.734
Crystal System
Monoclinic
Luster
Vitreous
Cleavage
Perfect
Fracture
Conchoidal
Color
various
Birefringence
0.029
Pleochroism
Pale yellow - yellow-orange - orange to red-brown
Mohs Hardness
| Mohs | Reference mineral | Neptunite |
|---|---|---|
| 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 Neptunite
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 Neptunite
海神石是一种含钛的链状硅酸盐矿物，以其深邃的黑色至红黑色和金属光泽著称。海神石通常呈细长的棱柱状晶体，常嵌生于白色岩石（如白钠沸石）中，形成强烈的色彩对比，因而成为极具视觉冲击力的矿物标本。海神石主要产于美国加利福尼亚州圣贝尼托县（San Benito County）的蓝线石矿床中，与钙铁榴石等矿物共生。因硬度较低且解理完全，宝石级切割十分困难，但透明至半透明的小型刻面石对专业收藏家极具吸引力。
On this page
Jewelry Use
Durability
4/10
Science FYI Family
Frequently Asked Questions
What is Neptunite?
海神石是一种含钛的链状硅酸盐矿物，以其深邃的黑色至红黑色和金属光泽著称。海神石通常呈细长的棱柱状晶体，常嵌生于白色岩石（如白钠沸石）中，形成强烈的色彩对比，因而成为极具视觉冲击力的矿物标本。海神石主要产于美国加利福尼亚州圣贝尼托县（San Benito County）的蓝线石矿床中，与钙铁榴石等矿物共生。因硬度较低且解理完全，宝石级切割十分困难，但透明至半透明的小型刻面石对专业收藏家极具吸引力。
What is the hardness of Neptunite?
Neptunite has a Mohs hardness of 5.0 to 6.0, making it moderate for use in jewelry.
What color is Neptunite?
Neptunite is primarily Various.
How much does Neptunite cost?
Neptunite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Neptunite?
Neptunite belongs to the Monoclinic crystal system.