Gemstones - Background and Lore - Chalcedony

Chalcedony is one of the oldest, most abundant, and most popular gemstones. The ancient Turkish seaport gave this gem it's name. This stone has been considered a powerful talisman and were thought to prevent drowning or drive away ghosts and bad spirits.

Chalcedony's affordability and range of colors and patterns make it a popular with gem collectors.

Chalcedony sources include Australia, Brazil, Czech Republic, Germany, Iceland, India, Italy, Mexico, Russia, Scotland, US, and Uruguay. It has a hardness of 6.5-7 on the Moh's Scale and a good toughness rating.

Some varieties of chalcedony include agate, amethystine chalcedony, bloodstone, carnelian, chrysocolla-in-chalcedony, chrysoprase, dendritic agate, fire agate, iris agate, jasper, milky chalcedony, onyx, sard, and sardonyx.

Chalcedony's color can change when exposed to heat, but light has no effect. hydrofluoric acid, nitric acid should not come in contact. Ultrasonic and steam cleaning are usually safe, but warm soapy water is best. Some alternatives include amber, hematite, jade, lapis lazuli, malachite, moonstone, rose quartz, shell, tiger eye, and turquoise.

Chalcedony is said to prevent touchiness and melancholy. Worn by many to promote calm and peace. Chalcedony also stimulates creativity.