noun. ['ˈdʒæsɪnθ'] a red transparent variety of zircon used as a gemstone.
1. Noun, singular or mass They are listed in an order according to the Roman calendar: jasper, sapphire, chalcedony, emerald; sardonyx, sardius (carnelian), chrysolite, beryl, topaz, chrysoprase, jacinth and amethyst.