(1) It is lawful to sell or buy a gemstone on which no picture of a living being is carved. However, according to the Shariah it shall be unlawful to sell or buy if the stone is carved like any living being and resembles a picture though no eye is carved.
(2) It is unlawful to make picture of living being though it is on stones or on some other thing whether eyes are carved or not in both the cases it is unlawful. The picture available on the link which you have provided clearly resembles like the picture of a living being hence it shall be unlawful to make or trade it.
Allah knows Best!
Darul Uloom Deoband