Very Beautiful necklace with attached pendant crafted in solid Platinum and set with natural Solid Australian Blue opal with diamonds! this is the quality made item, not thin and well built - will last! opal is solid and NOT doublet or triplet! the opal has very High Brightness! HallMarked on the pendant (please see photos): for platinum purity - PT900 and 0.52 Ct for opal and 0.10Ct for the diamonds; and marked on the chain Pt850 for platinum purity. the chain can not be detached from the pendant. the chain is not thin and the pendant is heavy for its size and built to last! the prongs are long and thick and hold the opal very secure! the Weight approx 4.45g! the length of the necklace approx 16?. please see enlarged photos for the details (the photos are enlarged to show the details). in excellent and shiny perfect condition! ready to be gifted or worn! Very well made and durable anough for everyday wear! high quality! it was professionally polished to look perfect! the stones were verified by professional gemologist! fast Priority USA shipping in a jewelry case - can be worn/gifted immediately! smoke free environment! thank you international shipping! thank you for visiting and interest in my items!