Physical Features:
Chemical | SiO2 |
Color | Brown, black, colorless, green, pink, violet, white, yellow, orange, purple |
Crystal Habit | Prismatic |
Crystal System | Trigonal |
Cleavage | None |
Fracture | Conchoidal |
Hardness | 7 Mohs scale |
Luster | Vitreous |
Streak | White |
Transparency | Transparent, Translucent |
Specific gravity | 2.65 |
Refractive index | 1.544 - 1.553 |
Birefringence | 0.009 |
Quartz is a highly varied mineral, and itswide range of colors goes on to produce various types of gemstones. Amongstquartz gem variety, citrine and amethyst are easily the most famous. However,other forms of the quartz also produce important gemstones. The best thing isthat all forms are very reasonably priced. They get cut into numerous gemstonecuts as well as cabochons, and then used in various types of jewelry. You canget this jewelry and gemstones online quite easily. However, in this context,its important to mention that the rock crystal variety is usually not cut intothe form of gemstones. But some of the small crystals carved out from a rockcrystal may sometime get used as pendants, often being smoothed and polished,and at times in completely original crystal form.
Quartz is very common and can be found invarious locations all across the globe. However, some of the prolific quartzproducers are U.S.(Arkansas), India, Madagascar, and Brazil. The primary crystalline form ofquartz variety that are used as beautiful gemstones are the cats eye quartz, tourmalinatedquartz, blue quartz, prasiolite (green quartz), ametrine, rutilated quartz,milky quartz, rock crystal, rose quartz, smoky quartz, citrine, and the amethyst.Now, out of all these, the amethyst (purple version) is clearly the most famousor popular. So, if you feel like, you can conduct a research on your own and buyquartz online (any form as per your liking) from the comfort of your home.
Interestingly, apart from the amethyst(purple version) and the citrine to some extent, the smoky quartz has alsobecome quite popular in the recent times. This form of quartz is usually brownin color. The black version is a little rare. Its mostly used as a ring or asa pendant. So, you can buy them for your friends and family members. Best ofluck!