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Quartz crystal is crystallized silicon dioxide (SiO2). Quartz crystals are quite hard, around 7 on the Mohs scale, just under diamond which, along with concerns such as silicate dust makes these...
Polishing cut rocks is a rewarding experience; you get to take something that is dull and make it shine. How you polish rocks will depend on what type of rock you are polishing. Soft Rocks such...
Grading sapphires is very similar to grading others gems. The common color range for sapphires consists of primarily blues, yet sapphires can come in many hues and variations depending on the...
Gem stones can be drilled for decorative purpose or to allow them to be hung on necklaces, earrings and other jewelry. With practice, you can drill larger decorative holes. It takes a bit of care...
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