Russian Demantoid Garnet 1.73 ct 7mm Round. The Stone Has A Horsetail Inclusion. The Gemstone Was Mined In Russia And Cut In Russia. Also has an AGL certificate While each garnet is unique in its own right, demantoid may be one of the most exquisite. Often times stones are not prized for their inclusions in the case of Russian demantoid garnet it is just the opposite. Horsetail inclusions like the ones found in fine demantoid like this one radiate throughout the stone.