It begins when coral die off and the silica in the ocean water begins to harden. The Coral then “pseudo morphs” into an Agate, since one mineral replaces another while keeping its original form. The end result is crystallized pieces of coral captured in a stone! Pendant’s Length: 2 1/8” Stone Dimensions: 1 1/8”x1 5/8” P.S. TO BUYERS: If your allergic to mix metal this is not for you. Set on 925S over copper. Some of the pieces might have cracks on it due to the nature of the stone. Please look at the photos intently. If you have questions please ask.Every piece is unique. Please also note the photos are enlarged slightly for your convenience so make sure to notice the actual measurements or length of the item on the "product description" as it maybe smaller than the representing photo. Colors of the stone also may be slightly vary than the pictures due to light and exposure so please do not expect perfection and complain that you did not get the right or exact item as pictured.The item you will be getting is the item pictured here. Thank you for Looking!