Some stones, such as aquamarine ... They are the most expensive type of diamond, costing more than blue or pink ones. Again, experts disagree about what gives a red diamond its color, as they ...

For the designer and gemologist Cora Sheibani, jewelry is much more than a status symbol, a decorative object or a talisman ...

Sharpening stones use several different types of abrasive grains. Examples include aluminum oxide, silicon carbide, super-abrasive diamond, and cubic boron nitride. Aluminum oxide, the most common ...

Regardless of the type of diamond system used, these attachments come at a premium price when compared with silicone carbide grinding stones, but also provide much higher productivity and service ...