This is a genuine Mexican 10 Centavos coin necklace on a 20" black silk braided cord <3 I love to collect coins and make things out of them 😁 Each necklace is unique and features silver plated details. This specific coin is made of a very durable copper-nickel alloy, minted in the United Mexican States during 1936 Coin is made up of copper-nickel, weighs about 5.5 grams (0.2 oz.) Check out Numista for more details-- I've included some screenshots from their site for informational purposes. Original necklace design, handmade by me! Of course, handmade can mean anything, but I source, identify, drill, and assemble each coin necklace myself <3