Carnelian Vs. Sodalite
Carnelian is a popular gemstone composed of silicon dioxide.[1] Sodalite is also a popular gemstone and its chemical composition is sodium aluminum silicate.[2]
Quick Facts on Differences of Carnelian and Sodalite
For a quick recap of the differences carnelian and sodalite:- For chemical formulas, carnelian is SiO2 while sodalite is Na8Al6Si6O24Cl2.
- While both carnelian and sodalite is vitreous, in terms of luster, sodalite can be greasy or waxy.
- Carnelian can be commonly orange or red while sodalite can be commonly blue.
- Carnelian's rarity is less rare than sodalite.
- Carnelian's hardness is higher than sodalite - carnelian ranges from 6.5 to 7 and sodalite ranges from 5.5 to 6 on the Moh's scale.
- Carnelian's specific gravity is higher than sodalite - carnelian ranges from 2.58 to 2.64 and sodalite ranges from 2.14 to 2.28.
Quick Facts on Similarities of Carnelian and Sodalite
The similarities of carnelian and sodalite include:- Carnelian and sodalite both can be opaque, translucent or transparent.
- Carnelian and sodalite both streak white.
Summary of Carnelian
Carnelian is a mineral that belongs to the chalcedony group of minerals. It is a translucent to opaque stone that is commonly red, brown, or orange in color. It is often used in jewelry and decorative objects due to its attractive appearance and durability.Summary of Sodalite
Sodalite is a beautiful and unique mineral that is often used in jewelry making, decorative objects, and even as a healing stone. It was first discovered in Greenland in 1806 and has since been found in other parts of the world, including Brazil, Canada, and the United States. Sodalite is a member of the feldspathoid group of minerals and is often confused with lapis lazuli due to its similar deep blue color.Table Comparison of Carnelian vs Sodalite
Carnelian (src) | Sodalite (src) | |
---|---|---|
Transparency | transparent, translucent, opaque | transparent, translucent, opaque |
Chemical Formula | SiO2 | Na8Al6Si6O24Cl2 |
Chemical Composition | silicon dioxide | sodium aluminum silicate |
Specific Gravity | 2.58, 2.64 | 2.14, 2.28, 2.4 |
Hardness | 6.5, 7 | 5.5, 6 |
Streak | white | white |
Refractive Index | 1.535, 1.539 | 1.483, 1.487 |
Hydrous | No | No |
Colors | common: red, orange |
common: blue sometimes: green, yellow less common: white, purple, violet, colorless, red |
Category | chalcedony | tectosilicates |
Fracture | uneven | conchoidal, uneven |