Franklinite
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
6.0
Specific Gravity
5.05 – 5.22
Crystal System
Isometric
Cleavage
Fair
Fracture
Uneven,Sub-Conchoidal
Color
various
Mohs Hardness
| Mohs | Reference mineral | Franklinite |
|---|---|---|
| 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
Moderate ($50-500/ct)
Where to Buy Franklinite
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 Franklinite
フランクリナイトは、亜鉛鉄マンガン酸化物鉱物（ZnFe₂O₄）で、スピネルグループに属します。黒色から褐色の金属光沢を持つ鉱物で、ニュージャージー州フランクリン鉱山が唯一の主要産地として世界的に有名です。ウィレマイトやカルサイトと共に産出し、紫外線下で美しい蛍光を示す標本が人気です。
On this page
Jewelry Use
Durability
5/10
Science FYI Family
Frequently Asked Questions
What is Franklinite?
フランクリナイトは、亜鉛鉄マンガン酸化物鉱物（ZnFe₂O₄）で、スピネルグループに属します。黒色から褐色の金属光沢を持つ鉱物で、ニュージャージー州フランクリン鉱山が唯一の主要産地として世界的に有名です。ウィレマイトやカルサイトと共に産出し、紫外線下で美しい蛍光を示す標本が人気です。
What is the hardness of Franklinite?
Franklinite has a Mohs hardness of 6.0, making it moderate for use in jewelry.
What color is Franklinite?
Franklinite is primarily Various.
How much does Franklinite cost?
Franklinite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Franklinite?
Franklinite belongs to the Isometric crystal system.