Excellent used condition Three little round stones accentuate a Trillion Cut Oregon Sunstone set in prongs 6.5mm x 4mm threaded end with (1) 3mm Trillion Cut Oregon Sunstone & (3) 1.25mm Round Genuine Grey Sapphires AA in Prongs Any piercing studio will have a flat back. I believe it’s threaded but your piercer will confirm. Second pic shows how it can be worn (not actual piece). Third photo is with flash. Fourth is without - I wasn’t able to get a clearer picture without flash **Important: BVLA has a lifetime guarantee on their products which is unheard of. You’ll never have to worry about losing stones 😊