Yes, these are real meteorite rings, each with a chunk of a Campo Del Cielo meteorite, set in sterling silver. You can own an authentic space rock, and wear it on your finger! Also a wonderful gift idea for a science or space fan. The Campo Del Cielo region of Argentina has a large field of meteorites, which fell from the skies 4000-5000 years ago. These are very metallic, iron-filled meteorites. The following rings are currently available: A - size 6 3/8 (between size M 1/2 and N), about 16.8 mm in diameter; stone is 8 mm (1/3 inch) long B - size 7 1/4 (size O 1/2), about 17.4 mm in diameter; stone is 12 mm (3/5 inches) long C - size 6 1/2 (size N), about 17 mm in diameter; stone is 13 mm (just over 1/2 an inch) long D - just over size 8 3/4 (size R 1/4), about 17.75 mm in diameter; stone is 11 mm (almost 1/2 inch) long E - size 8 1/4 (size Q 1/2), about 18.4 mm in diameter; stone is 17 mm (2/3 inches) long I also have meteorite pendants and earrings on hand that I haven’t photographed yet; please contact me if you are interested. These rings come from a trusted supplier; they are not handmade by me. Materials: genuine Campo Del Cielo meteorite, .925 sterling silver