Jacobsite
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
5.5 – 6.5
Specific Gravity
4.76 – 5.03
Crystal System
Isometric
Color
various
Mohs Hardness
| Mohs | Reference mineral | Jacobsite |
|---|---|---|
| 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 Jacobsite
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 Jacobsite
锰铁矿（雅各布石）是尖晶石族中含锰铁的成员，通常呈黑色至深棕黑色，具有金属至半金属光泽，晶体呈八面体形态。锰铁矿主要产于变质锰矿床中，与黑锰矿、菱锰矿等矿物共生，在瑞典、印度、南非和美国等地均有发现。由于外观深暗不透明，宝石价值有限，主要作为锰矿石矿物和矿物学研究对象，在专业收藏领域有一定的关注度。
On this page
Jewelry Use
Durability
4/10
Science FYI Family
Frequently Asked Questions
What is Jacobsite?
锰铁矿（雅各布石）是尖晶石族中含锰铁的成员，通常呈黑色至深棕黑色，具有金属至半金属光泽，晶体呈八面体形态。锰铁矿主要产于变质锰矿床中，与黑锰矿、菱锰矿等矿物共生，在瑞典、印度、南非和美国等地均有发现。由于外观深暗不透明，宝石价值有限，主要作为锰矿石矿物和矿物学研究对象，在专业收藏领域有一定的关注度。
What is the hardness of Jacobsite?
Jacobsite has a Mohs hardness of 5.5 to 6.5, making it moderate for use in jewelry.
What color is Jacobsite?
Jacobsite is primarily Various.
How much does Jacobsite cost?
Jacobsite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Jacobsite?
Jacobsite belongs to the Isometric crystal system.