- Made out of .925 Sterling Silver.- Sterling Silver is rhodium plated for tarnish resistance.- Gold Vermeil is 3x coated with 14k gold for durable gold plating.- Completely solid, heavy, and double-sided. Chain options range from 3mm to 4mm in thickness, depending on what pendant size is chosen. By default, smaller pendants come with smaller chains. Sterling Silver Box Chain With Round Pendant, Cuban Link Metal Jewelry For Gifts, Sterling Silver Round Box Chain Jewelry, Sterling Silver Box Chain Necklace Fine Jewelry, Sterling Silver Box Chain Necklace In Fine Jewelry Style, White Gold Metal Necklace Tarnish Resistant, Tarnish Resistant White Gold Metal Necklace, Polished White Gold Pendant Jewelry, White Gold Pendant With Polished Finish