Moon Necklace - Moon Phase Necklace - Astrological Moon Necklace - Small Moon Charm Pendant - Sterling, over time, may take on a nice antique patina and/or cause temporary skin discoloration. Aluminum disc is lightweight, very low skin reaction rate, won't tarnish & won't turn your skin green! - Each disc is hand punched, tumbled to an awesome shine, stamped by hand, and then oxidized for contrast - 9/16 Discs (about 14 mm) - The moon image is rendered and engraved one piece at a time, here in our studio. - Sterling option is on an 18 inch chain and aluminum option is on an 18 inch or 24 inch chain. ? Check out our Policy page for details regarding production turnaround time, domestic and international shipping information and options, and other FAQs https://www.etsy.com/shop/TesoroJewelry/policy ? All pieces are personally hand cut/punched and engraved by us. These variations create uniqueness, adding charm and character to every handmade piece.