This is the polished on the one side blue violane specimen. Dimensions: 2.2 x 1.6 x 1.0″ (5.7 x 4 x 2.5cm). Weight — 3.1oz (87 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.