Chalcedony : Semi-Transparent to opaque in virtually any color. Including Chrysoprase (light to medium yellowish green), Carnelian (yellow orange to orangy red, brownish red or brownish orange), Chrysocolla (intense light blue of blue green), Lavender Chalcedony and Bloodstone (dark green with red to brownish red spots). Carnelian in the birthstone for Virgo and Bloodstone is the birthstone for March and Aries. Chalcedony also includes Agate (Birthstone for Gemini), Landscape Agate, Moss Agate, Onyx (stone for Leo and 7th Wedding Anniversary), Sard, Sardonyx (Birthstone for August), Carnelian Onyx, Jasper, Iris Agate, Petrified Wood and Fire Agate. Chalcedony's are found in Iceland, India, Russia, the USA, Australia, Czechoslovakia, Brazil, Uruguay, Scotland, Germany, China, Madagascar, Italy and Mexico