African Turquoise Collar-Length Necklace with Indian Coin. This genuine African turquoise chain and antique gold necklace is accented with a Indian Head Coin. The choker necklace that is 18" in length plus 2.5 inch extender makes it great for layering with longer necklaces. Although your item will resemble the photo, each piece is created by hand, so no two are identical. Shop boho necklaces and western jewelry at Bourbon Cowgirl.