AllMineralsRock
Quartz Vs. Vanadinite
Quartz is a very popular gemstone composed of silicon dioxide.[1] Vanadinite is a popular mineral and its chemical composition is lead chlorovanadate.[2]
Quick Facts on Differences of Quartz and Vanadinite
For a quick recap of the differences quartz and vanadinite:- While both quartz and vanadinite can be hexagonal, in terms of crystallography, quartz can be trigonal.
- For chemical formulas, quartz is SiO2 while vanadinite is Pb5(VO4)3Cl.
- While both quartz and vanadinite can be greasy, in terms of luster, quartz can be vitreous or waxy and vanadinite can be adamantine or resinous.
- Quartz streaks white while vanadinite streaks light yellow or yellow.
- While both quartz and vanadinite can be commonly red or yellow, vanadinite is often brown.
- Quartz's rarity is less rare than vanadinite.
- Quartz's hardness is higher than vanadinite - quartz is 7 and vanadinite ranges from 2.5 to 3 on the Moh's scale.
- Quartz's specific gravity is lower than vanadinite - quartz ranges from 2.651 to 2.91 and vanadinite ranges from 6.5 to 6.88.
Quick Facts on Similarities of Quartz and Vanadinite
The similarities of quartz and vanadinite include:- Quartz and vanadinite both can be opaque, translucent or transparent.
Summary of Quartz
Quartz is a mineral that is composed of silicon and oxygen atoms arranged in a continuous framework of SiO4 silicon-oxygen tetrahedra. It is one of the most abundant minerals found in the Earth's crust. Quartz can be found in a variety of colors such as white, pink, purple, brown, gray, and black. It is also known for its unique crystal structure, which is hexagonal in shape, and its hardness, which is 7 on the Mohs scale.Summary of Vanadinite
Vanadinite is a mineral that is composed of lead, vanadium, oxygen, and chlorine. It typically forms as small hexagonal crystals that are bright red to orange in color. It is commonly found in arid regions and is often associated with other lead minerals such as galena and cerussite. Vanadinite is also known for its distinctive crystal habit, which consists of small hexagonal prisms that are often clustered together.Table Comparison of Quartz vs Vanadinite
| Quartz (src) | Vanadinite (src) | |
|---|---|---|
| Transparency | transparent, translucent, opaque | transparent, translucent, opaque |
| Chemical Formula | SiO2 | Pb5(VO4)3Cl |
| Chemical Composition | silicon dioxide | lead chlorovanadate |
| Specific Gravity | 2.651, 2.91 | 6.5, 6.88, 7.1 |
| Hardness | 7 | 2.5, 3 |
| Streak | white | light yellow, yellow |
| Crystallography | hexagonal, trigonal | hexagonal |
| Refractive Index | 1.544, 1.553 | 2.35, 2.416 |
| Hydrous | No | No |
| Colors | common: red, yellow sometimes: blue, gray, pink, black, brown, green, white, orange, purple, violet, colorless, multicolor |
common: brown, red, yellow sometimes: orange, colorless less common: gray, pale, white, multicolor |
| Category | silicate | vanadate |
| Birefringence | δ = +0.009 (B-G interval) | δ = 0.066 |
| Fracture | conchoidal, uneven | conchoidal, uneven |