Alexandrite : A stone noted for its color changing abilities. Colors are greenish outdoors, and reddish to violet under artificial light. Alexandrite is extremely rare. Alexandrite is one of the birthstones for June.
Amethyst : A semi-precious quartz gemstone, ranging in color from clear purple to bluish violet. Birthstone for February.
Aquamarine : Semi-precious porous stone ranging in color from light blue to sea green. Birthstone for March.
Black Star Sapphire : A cabochon cut black sapphire that displays a 6 ray star. These stones are always heat treated to improve their color.
Blue Star Sapphire : A cabochon cut blue sapphire displaying a 3 ray, 6 point star.
Blue Topaz : A topaz ranging in color from pale blue to bright blue. Most blue topaz is irradiated & heat treated to produce their blue color. Birthstone for December.
Cats Eye : A phenomenon seen in various gems when they are cabochon cut, resulting in a bright single line down the center.
Ceylon Sapphire : These deep royal blue sapphires from Sri Lanka, formally Ceylon, are the finest in the world.
Citrine : A semi-precious quartz gemstone, ranging in color from a light yellow to a brilliant orange.
Diamond : A very valued gem composed of pure carbon, the hardest of all known natural substances. Birthstone for April.
Emerald : One of the most valuable gems, ranging in color from green to bluish-green. Birthstone for May.
Garnet : A group of semi-precious stones ranging in all colors but blue. Most commonly a deep red. Birthstone for January.
Iolite : A transparent, violet blue, light or yellow gray mineral. Also know as the water sapphire.
Mother of Pearl : The material obtained from the inside of the shell of a certain large mollusk.
Multi-Stone : When several different types of gemstones are grouped together in a setting.
Onyx : A semi precious stone that is usually black.
Opal : Semi-precious stones that are luminous and iridescent, frequently with inclusions of many colors. Birthstone for October.
Pearl : Organic gems grown within oysters. Birthstone for June.
Peridot : A yellow-green semi-precious stone. Birthstone for August.
Pink Tourmaline : A pink to reddish color gemstone. One of the birthstones for October.
Ruby : A hard precious stone ranging from the classic deep red to pink to purple to brown. Ruby and Sapphire are the next hardest gemstones after diamond. Birthstone for the month of July.
Sapphire : One of the hardest and most durable gems, it and Ruby are the next hardest gemstones after diamond. Although popular as a blue gem, it occurs in a wide variety of colors, including pink, green and yellow. Birthstone for September.
Tanzanite : A valuable transparent blue-purple stone.
Topaz : A very hard gemstone ranging in color from brown to yellow to blue to pink. Birthstone for November.