Genuine , Natural Australian Boulder Opal Choker Necklace Artisan Handmade with recycled.925 Sterling Silver and Fine Silver * Please note this is a genuine Boulder Opal and not a doublet or triplet This is a chunky , heavy curb chain weighing 22.41 grams and measuring 15.5 “ Artisan: Kyler Shae Location: Perth, Western Australia IG Page: arivelastudios formerly known as “ Krows Jewellery and Art Works”