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
ジェイコブサイトは、マンガン鉄亜鉛酸化物鉱物（MnFe₂O₄）で、スピネルグループに属します。黒色から褐黒色の金属光沢を持ち、スウェーデンのヤコブスベルク鉱山で初めて発見されたことから命名されました。宝石としての利用はほとんどなく、主に鉱物学的関心の対象です。
On this page
Jewelry Use
Durability
4/10
Science FYI Family
Frequently Asked Questions
What is Jacobsite?
ジェイコブサイトは、マンガン鉄亜鉛酸化物鉱物（MnFe₂O₄）で、スピネルグループに属します。黒色から褐黒色の金属光沢を持ち、スウェーデンのヤコブスベルク鉱山で初めて発見されたことから命名されました。宝石としての利用はほとんどなく、主に鉱物学的関心の対象です。
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.