Ruby in Zoisite Page 2 Ruby-in-Zoisite is a blend of two materials: crystaline aggregates
of green Zoisite, and Ruby inclusions. This creates a lovely combination
of colors, the green from the zoisite and a red/pink from the ruby. Ruby-in-Zoisite
takes a good polish with diamond. Mohs hardness ranges from 6 for the zoisite
to 9 for the ruby. The ruby tends to be chatoyant, but it also can chip
out during cutting. Therefore, careful cutting with finer wheels is required
to get a quality finish.