JonathanBuckhead offers Custom Design Services. Excellent master craftspeople are available for any custom design job, including hand-built platinum jewelry… a rarity in the design world. Also working in 18karat gold, our jewelers can hand-build or cast jewelry to your heart’s desire. Semi-mountings for your precious gems are custom designed to fit any size existing stone. Whether an entirely new piece or updating an old one. . . count on us for the best results possible. We are jewelers… our craftsmen have been custom designing and manufacturing Fine Jewelry for generations.