Sodalite

saf-ahyuh r

Sodalite is a mineral used most often for carvings and some types of jewelry. Known for its rich, royal blue hues, sodalite is found in limited areas of the world. Frequently mottled with white veins of calcite, sodalite resembles lapis lazuli in appearance and has been mistaken for it at times. It can occur not only as blue, but also in crystals of gray, yellow, green or pink color.

Sodalite Polished
Sodalite Classification
Common Name Sodalite
Species Sodalite
Sodalite Optical Properties
Transparency Opaque
Refractive Index 1.483
Tolerance:(+0.004/-).004)
Optic Character NA
Optic Sign NA
Polariscope Reaction Aggregate (AGG)
Fluorescence SWUV: moderate orange, green, or yellowish white
LWUV: moderate to strong orange, yellowish white, or red
Pleochroism None
Sodalite Characteristic Physical Properties
Hardness 5-6
Streak White
Specific Gravity 2.150-2.400 Typical:2.250
Toughness Poor
Inclusions Sodalite usually has white calcite patches and veins. Stones lack pyrite inclusions unlike lapis.
Luster Vitreous, Greasy
Fracture Uneven
Cleavage Poor, in one direction
Sodalite Chemistry & Crystallography
Chemical Name chloric sodium aluminum silicate
Chemical Formula Na8Al6Si6O24Cl2
Crystal System Cubic
Chemistry Classification Silicate

Sodalite Colors

  • Black Sodalite Black
  • White Sodalite White
  • Pink Sodalite Pink
  • Multi-color Sodalite Multi-color

Alternate Names

Canadian Blue Stone, Hackmanite

Countries of Origin

Afghanistan; Unknown; China; Brazil; Mexico; South Africa; Bolivia (Plurinational State of)

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Species/Variety

Sodalite-Single Crystal

Sodalite is a mineral used most often for carvings and some types of jewelry. Known for its rich, royal blue hues, sodalite is found in limited areas of the world. Frequently mottled with white veins of calcite, sodalite resembles lapis lazuli in appearance and has been mistaken for it at times. It can occur not only as blue, but also in crystals of gray, yellow, green or pink color.

Sodalite-Single Crystal Sodalite
Sodalite-Single Crystal Classification
Common Name Sodalite-Single Crystal
Sodalite-Single Crystal Optical Properties
Dispersion Strength: moderate fire Value: 0.018
Fluorescence LWUV: Inert to Weak Orange
Sodalite-Single Crystal Characteristic Physical properties
Inclusions Transparent sodalite sometimes has small black inclusions.
Tim Matthews

Author

Tim Matthews

Tim Matthews is President and Chief Executive Officer of Jewelry Television® (JTV), as well as a member of the company's Board of Directors. He oversees and leads all aspects of the company's powerful omni-digital retail platform that uniquely specializes in fine jewelry and gemstones. His passion for business and gemstones has led him to become a recognized expert in the field of gemology. He is a life member of the Gemmological Association of Great Britain (Gem-A) and has earned Gem-A's highest degrees, the Gemmology (FGA) and Diamond (DGA) diplomas. He is also a Graduate Gemologist (GG) of the Gemological Institute of America (GIA) and has also completed GIA's Graduate Diplomas in Diamonds, Colored Stones and Pearls. Under his leadership, JTV has become the leader in the sourcing and selling of color gemstones and jewelry.

This page was created on June 27, 2014.

This page was last edited on October 24, 2019.