An ancient gemstone, peridot has adorned jewelry pieces as long ago as the time of the time of the Pharaohs in Egypt. One of the few semiprecious gemstones found only in shades of green, peridot is the gem-quality subset of the mineral olivine, is an official birthstone for those born in the month of August.
A gem variety of crystalline quartz, citrine ranges in color from golden yellow to orange. Closely related to amethyst, sometimes the two minerals are found growing together in the same crystal. An alternate birthstone for those born in November, some wearers believe that citrine can help improve personal clarity and eliminate self-destructive tendencies.
Carnelian is a variety of semiprecious quartz with a brownish red to orange color. One of the oldest known gemstones, carnelian was prized by nobility throughout antiquity, and was often used in seal or signet rings. Carnelian is believed to bring good luck to its wearer.