Sodalite
What is Sodalite?
Sodalite is a tectosilicate mineral with a rich blue color, often used as an ornamental gemstone. It is a member of the feldspathoid group and is closely related to lazurite and lapis lazuli. Sodalite is characterized by its vitreous luster and its typical blue, violet, or greyish-blue color, although it can also be found in other colors such as white, yellow, green, or pink. The name 'sodalite' is derived from its sodium content.
Optical Properties
- Refractive Index
- 1.483 - 1.489
- Birefringence
- Absent
- Pleochroism
- None
- Optical Character
- Isotropic
- Dispersion
- Low
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Sodalite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Sodalite Localities Map
See where Sodalite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
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Quick Facts
Physical Properties
- Color
- Blue, violet, greyish-blue, white, yellow, green, pink
- Hardness (Mohs)
- 5.5 to 6
- Density
- 2.14 to 2.40 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- Na₈Al₆Si₆O₂₄Cl₂
- Elements
- Sodium, Aluminum, Silicon, Oxygen, Chlorine
Also Known As
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Sodalite FAQs
How do I identify Sodalite?
Sodalite can be identified by its hardness of 5.5 to 6 on the Mohs scale, Blue color. Look for these key characteristics when examining specimens.
What color is Sodalite?
Sodalite typically appears in Blue, violet, greyish-blue, white, yellow, green, pink. Color can vary depending on impurities and formation conditions.
How hard is Sodalite?
Sodalite has a hardness of 5.5 to 6 on the Mohs scale. This gives it moderate hardness.