This is the polished green lavrovite specimen. Dimensions: 3.8 x 2.4 x 0.7″ (9.7 x 6.2 x 1.7cm). Weight – 6.7oz (190 grams). Origin: Russia, Siberia.
Some information about lavrovite:
Lavrovite is a green vanadium-bearing variety of Diopside, with an admixture of vanadium 1.5% and more V2O3; found near Lake Baikal in Siberia.