The IBU Jewels Mary ring comes with a semi precious Green Aventurine stone. Cast in brass material and plated with a 14K layer of gold. Finished with a ceramic coating for a longer duration of the gold plating. * One size fits all * Green Aventurine stone _Gold plating is the process where a thin layer of gold is bonded onto a base metal. By taking proper care of gold plated jewelry you can extend it's life. Please use these steps ;_ * _Keep gold plated jewelry away from chemicals, oils and make up._ * _Take off gold plated jewelry before swimming and bathing._ * _Do not spray on perfume while wearing your gold plated jewelry. Wear your jewelry after you have sprayed on your favourite perfume._