Trending Design Your Own Gemstone Ring / For example, if you are willing to design your own gemstone ring, you may choose the setting at the beginning then select the central gemstone and the diamonds that would surround it or you can search through magazines and websites for the shapes of rings and combine any parts you like in different. Round green tourmaline easily appeared as the pedigree of the lot. Design Your Own Gemstone Ring - Design your own engagement rings.