Sellaite
Embed This Widget
Add the script tag and a data attribute to embed this widget.
Embed via iframe for maximum compatibility.
<iframe src="https://gemfyi.com/iframe/entity/sellaite/" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://gemfyi.com/entity/sellaite/Add a dynamic SVG badge to your README or docs.
[](https://gemfyi.com/entity/sellaite/)Use the native HTML custom element.
Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
5.0 – 5.5
Specific Gravity
3.14 – 3.16
Refractive Index
1.378 – 1.39
Crystal System
Tetragonal
Luster
Vitreous
Cleavage
Distinct
Fracture
Conchoidal
Color
various
Birefringence
0.01
Mohs Hardness
| Mohs | Reference mineral | Sellaite |
|---|---|---|
| 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 Sellaite
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 Sellaite
Sellaite is a rare magnesium fluoride mineral that forms colorless to white tetragonal prisms with a vitreous to pearly luster in hydrothermal veins and volcanic fumaroles. It was first described from the Sella Valley in Piedmont, Italy, and is also found in Vesuvian lavas and in evaporite deposits. Specimens are of primarily scientific interest, though transparent crystals have occasionally been faceted for mineral collectors.
On this page
Jewelry Use
Durability
4/10
Science FYI Family
Frequently Asked Questions
What is Sellaite?
Sellaite is a rare magnesium fluoride mineral that forms colorless to white tetragonal prisms with a vitreous to pearly luster in hydrothermal veins and volcanic fumaroles. It was first described from the Sella Valley in Piedmont, Italy, and is also found in Vesuvian lavas and in evaporite deposits.
What is the hardness of Sellaite?
Sellaite has a Mohs hardness of 5.0 to 5.5, making it moderate for use in jewelry.
What color is Sellaite?
Sellaite is primarily Various.
How much does Sellaite cost?
Sellaite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Sellaite?
Sellaite belongs to the Tetragonal crystal system.