Ruby Zoisite is a gem rock variety of corundium, zoisite and hornblende. Although it is not a fine ruby, it is a very colorful ornamental gemstone and is used in decorative carvings, besides cabochons.
It is a metamorphic rock known as anyolite. It is an unusual gemstone because of its marked differences in hardness of its main constituents (zoisite-6.5 Corudum-9). This suggests the fusion between the two rocks is difficult.
* Scientific proof may not be available to substantiate these claims.