AllMineralsRock
Jasper Vs. Tourmaline
Jasper is a very popular gemstone composed of silicon dioxide.[1] Tourmaline is also a very popular gemstone and its chemical composition is boron silicate.[2]
Quick Facts on Differences of Jasper and Tourmaline
For a quick recap of the differences jasper and tourmaline:- While both jasper and tourmaline is opaque, tourmaline can be translucent or transparent.
- While both jasper and tourmaline is hexagonal, in terms of crystallography, tourmaline can be trigonal.
- For chemical formulas, jasper is SiO2 while tourmaline can be (Ca, Al, B)6O18(OH, Cr, F)4, Fe, Fe, K, Li, Mg, Mn)3(Al, Na)(Al or V)6(BO3)3(Si.
- While both jasper and tourmaline can be vitreous, in terms of luster, jasper can be dull or waxy.
- Jasper's rarity is less rare than tourmaline.
Quick Facts on Similarities of Jasper and Tourmaline
The similarities of jasper and tourmaline include:- Jasper and tourmaline both streak white.
- Jasper and tourmaline both are red.
- Jasper's hardness overlaps with tourmaline - jasper ranges from 6.5 to 7 and tourmaline ranges from 7 to 7.5 on the Moh's scale.
- Jasper's specific gravity overlaps with tourmaline - jasper ranges from 2.55 to 2.91 and tourmaline ranges from 2.82 to 3.9.
Summary of Jasper
Jasper is a type of mineral that is commonly found in sedimentary rocks, and is usually formed through the deposition of silica-rich sediments. It is a beautiful and unique mineral that comes in a variety of colors, including red, brown, yellow, green, and blue. Jasper is often used in jewelry making, as well as for decorative purposes in home decor and landscaping.Summary of Tourmaline
Tourmaline is a mineral that belongs to the silicate group and is known for its unique crystal structure and the wide range of colors it comes in. It is a complex mineral that contains boron, aluminum, and other elements. Tourmaline is found in many different parts of the world, including Brazil, Afghanistan, Pakistan, and the United States. The mineral can be identified by its prismatic crystal habit, which means that it has a long, column-like shape with flat faces on either end.Table Comparison of Jasper vs Tourmaline
| Jasper (src) | Tourmaline (src) | |
|---|---|---|
| Transparency | opaque | transparent, translucent, opaque |
| Chemical Formula | SiO2 | (Ca,K,Na)(Al,Fe,Li,Mg,Mn)3(Al,Cr,Fe,V)6(BO3)3(Si,Al,B)6O18(OH,F)4 |
| Chemical Composition | silicon dioxide | boron silicate |
| Specific Gravity | 2.55, 2.91 | 2.82, 3.9 |
| Hardness | 6.5, 7 | 7, 7.5 |
| Streak | white | white |
| Crystallography | hexagonal | hexagonal, trigonal |
| Refractive Index | 1.54, 1.553 | 1.603, 1.82 |
| Hydrous | No | No |
| Colors | common: red sometimes: yellow less common: blue, gray, black, brown, green, white, orange, band, multicolor |
common: red sometimes: blue, black less common: gray, pink, brown, green, white, orange, purple, violet, yellow, colorless, multicolor |
| Category | chalcedony | cyclosilicate |
| Birefringence | δ = 0.009 | δ = -0.018 to −0.040 |
| Fracture | conchoidal | conchoidal, uneven |