Friedelite
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
4.0 – 5.0
Specific Gravity
3.06 – 3.19
Refractive Index
1.627 – 1.663
Crystal System
Monoclinic
Luster
Vitreous
Cleavage
Perfect
Fracture
Uneven
Color
various
Birefringence
0.032
Pleochroism
Nil
Mohs Hardness
| Mohs | Reference mineral | Friedelite |
|---|---|---|
| 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 Friedelite
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 Friedelite
Friedelite is a manganese silicate hydroxide mineral occurring as dark rose-red to brownish-red tabular crystals with a vitreous to resinous luster. It was first described from the Benalite mine in Hérault, France, and also occurs notably at the Franklin zinc deposit in New Jersey, USA. While typically opaque, rare translucent material has been cut en cabochon, exhibiting a soft pinkish-red color valued by collectors.
On this page
Jewelry Use
Durability
3/10
Science FYI Family
Frequently Asked Questions
What is Friedelite?
Friedelite is a manganese silicate hydroxide mineral occurring as dark rose-red to brownish-red tabular crystals with a vitreous to resinous luster. It was first described from the Benalite mine in Hérault, France, and also occurs notably at the Franklin zinc deposit in New Jersey, USA. While typica
What is the hardness of Friedelite?
Friedelite has a Mohs hardness of 4.0 to 5.0, making it relatively soft for use in jewelry.
What color is Friedelite?
Friedelite is primarily Various.
How much does Friedelite cost?
Friedelite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Friedelite?
Friedelite belongs to the Monoclinic crystal system.