The translucent material displayed a vibrant bluish green color and is currently marketed under the trade name “Aquaprase.” Although chalcedony varieties such as chrysoprase and Gem Silica are well ...

Almost all amethyst (purple, pink and green) is heated to improve its appearance or deepen ... Wipe your jade jewelry with a soft cloth after wearing, and wipe it down with a gem cleaner every so ...

Gem varieties include green demantoid and tsavorite, orangy red hessonite and pink/red rhodolite. Besides brilliance and attractive colors, garnets sometimes exhibit optical phenomena such as asterism ...