minimum .30ct 6x4mm pear shape tanzanite. tanzanite was discovered in 1967 making it relatively new to the gem world. it has a unique color that only ceylon sapphire and iolite come close to matching. tanzanite is a 6.5 on the mohs' scale so loose st
minimum .30ct 5mm round chrome tourmaline. chrome tourmaline is colored by chromium and is the most valuable of the green tourmalines. it ranks a 7 on the moh's hardness scale and is not enhanced. chrome tourmaline is found in madagascar north americ