Lowest price:$157.99Description: approx 7.90ct 14x10mm ec russian lab alexandrite. alexandrite was discovered in 1830 in the emerald mines of the southern ural mtns. it is named for the russian tsar alexander ii. it's a rare stone that needs two kinds of stones to come together one that contributes aluminum/beryllium and the other chrome which rarely occurs in nature accounting for the rarity of the stone.