Tiny beads of metal are soldered to the surface to form a pattern. Grape garnets are made up of almandite and spessartite. Grape garnets are found in the Orissa district of northwestern India. Diamonds have a hardness of 10, a specific gravity of 3.5, and a refractive index of 2.417 - 2.419. They are a rare variety of andradite.
Demantoid garnets have characteristic inclusions that look like horsetails.
Demantoids were very popular in the 1800's, but are rarely used today. This stone is sometimes heat-treated . Tiger's eye has a hardness of 7.0. Located in Pforzheim, Germany, this company has been in business since 1938. Grosse has produced jewelry for Christian Dior since 1955.