Boracite
Boracite is a rare borate mineral known for its interesting crystal shapes and variable colors. It is mainly valued by mineral collectors due to its rarity and unique properties rather than for use in jewelry.
About
Boracite
Boracite is a rare and complex borate mineral with the chemical formula Mg₃B₇O₁₃Cl. It belongs to the borate mineral group and typically crystallizes in the orthorhombic crystal system, although it can appear pseudo-cubic due to its crystal habit. The mineral is known for its distinctive crystal shapes, which often resemble cubes or octahedrons, making it visually appealing to collectors. Boracite occurs in a range of colors, including colorless, white, gray, green, blue, and yellow. The variation in color is due to impurities present during its formation. It can be transparent to translucent and exhibits a vitreous to greasy luster. Well-formed crystals are relatively rare and are highly prized for their geometric beauty.
Physical & Chemical Properties
| Name | Boracite |
|---|---|
| Scientific Name | Boracite |
| Mineral Group | Borate |
| Hardness (Mohs) | 7 – 7.5 |
| Color | Colorless, white, gray, green, blue, yellow |
| Origin | Germany (type locality), France, USA, Bolivia, Turkey |
| Chemical Formula | Mg₃B₇O₁₃Cl |
Quick Facts
| Crystal System | Orthorhombic |
|---|---|
| Specific Gravity | 2.9 – 3.1 |
| Birthstone | NA |
| Refractive Index | 1.66 – 1.67 |
| Optical Character | Biaxial |
| Dispersion | Low |
| Major Sources | Germany (type locality), France, USA, Bolivia, Turkey |
| Treatments | Boracite is usually untreated |
| Price Range | $20 – $80 |
| Care Instructions | Handle carefully to avoid damage Clean with mild soap and water Avoid harsh chemicals Store separately |