This is the polished on the one side blue violane specimen. Dimensions: 2.6 x 1.5 x 1.3″ (6.5 x 3.8 x 3.2cm). Weight – 2.7oz (77 grams). Origin: Russia, Transbaikalia.
Some information about violane:
Violane is a variety of the diopside mineral bluish tones. Violane color is due to admixture of manganese and iron. Contains 10% jadeite and aegirine components.
Known deposits from Italy (Saint-Marcel, Piedmont) and Russia. In Russia deposits are located in the Transbaikalia, Altai and Sayan.