Sodalite
What is Sodalite?
Sodalite is a rich royal blue mineral that is well known for its intricate white or grey veining. It’s primarily found in Brazil, but it can also be sourced from other countries including Russia and Canada. Sodalite is often used as an ornamental gemstone and is a popular choice for jewelry.
Sodalite is a blue mineral known for its intricate white or grey veining. Its striking appearance makes it a popular choice for jewelry and decorative items. The stone is often used in necklaces, bracelets, and earrings, and is sometimes used to make beads.
| Chemical Classification | Inorganic - Silicate (Feldspathoid) |
| Color | Deep blue with white calcite inclusions. |
| Streak | White |
| Luster | Vitreous to greasy. |
| Transparency | Opaque. |
| Occurrence | Brazil, Canada, and Namibia. |
| Formation | Typically found in igneous environments and limestone cavities. |
| Diaphaneity | Opaque |
| Cleavage | Poor in six directions |
| Mohs Hardness | 5.5-6. |
| Specific Gravity | Approximately 2.1 to 2.3. |
| Diagnostic Properties | Blue color, often with white veins. |
| Chemical Composition | Na8(Al6Si6O24)Cl2 |
| Pleochroism | Not noticeable due to its opacity. |
| Crystal System | Cubic |
| Optical Properties | Biaxial (+) |
| Refractive Index | 1.483 |
| Birefringence | 0.01 |
| 2V angle | Measured: 58° |
| Dispersion | Not typically relevant for opaque stones like sodalite. |