Beryllonite
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
5.5 – 6.0
Specific Gravity
2.79 – 2.87
Refractive Index
1.552 – 1.562
Crystal System
Monoclinic
Cleavage
Perfect
Color
various
Birefringence
0.009
Dispersion
0.01
Pleochroism
Absent
Mohs Hardness
| Mohs | Reference mineral | Beryllonite |
|---|---|---|
| 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 Beryllonite
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 Beryllonite
Beryllonite is a rare sodium beryllium phosphate mineral forming colorless to pale yellow or white short prismatic crystals in granitic pegmatites. Gem-quality transparent material from Stoneham, Maine, and Minas Gerais, Brazil, is occasionally faceted, producing interesting if fragile collector gems with a vitreous luster. Its near-perfect cleavage makes cutting extremely challenging, and finished gems are highly unusual.
On this page
Jewelry Use
Durability
4/10
Science FYI Family
Frequently Asked Questions
What is Beryllonite?
Beryllonite is a rare sodium beryllium phosphate mineral forming colorless to pale yellow or white short prismatic crystals in granitic pegmatites. Gem-quality transparent material from Stoneham, Maine, and Minas Gerais, Brazil, is occasionally faceted, producing interesting if fragile collector gem
What is the hardness of Beryllonite?
Beryllonite has a Mohs hardness of 5.5 to 6.0, making it moderate for use in jewelry.
What color is Beryllonite?
Beryllonite is primarily Various.
How much does Beryllonite cost?
Beryllonite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Beryllonite?
Beryllonite belongs to the Monoclinic crystal system.