Quartz, the most abundant mineral, is also one of the most diverse minerals known. It's found in a rainbow of colors, and ranges from shimmering transparency to impenetrable opacity. Rock crystal, amethyst, and.... (2001) Complete Story
Which is the best to buy: natural, enhanced, imitation, artificial or synthetic gems? The answer depends on how you plan to use it. Natural gemstones have not had anything done to them that changes their color.... (2001) Complete Story
Every substance on Earth falls into one of three groups: animal, plant or mineral. Minerals are compounds of elements, like carbon, chromium and silicon. Gemstones are simply minerals that people have deemed attractive and, therefore, valuable.... (2001) Complete Story
Prized for its sky-blue color, turquoise has been used in amulets and jewelry since antiquity. The oldest known piece of jewelry is a turquoise and gold bracelet found in the tomb of Zer, an Egyptian queen who lived 7,500 years ago....
(2001) Complete Story