This is super beautiful item and in excellent condition! You will absolutely love it!! It is bezel set and perfect for everyday wear especially if it is your birthstone!! Solid Australian Opal is set in solid Platinum - made in Victorian Edwardian style! opal is solid Australian and not doublet or triplet. It is highly fiery with neon green flashes!as with most opals the colors are stronger on the Sun and direct indoor light and not so in a dark/low light. it is substantial size - please see photos! opal is 20.6x14mm approx. Weight is 5.17g, the chain is approx 15-16?, marked Pt 850 and tested. the chain can be replaced with another one you may have. If you do not need the chain -250 $ minus would be the price for the pendant only. Please message me. the opal has no cracks, no crazing, no scratches! Excellent condition! Comes with the platinum chain -the chain is well built and not thin! Opal is October birthstone. This stone is natural Australian opal and untreated! See last photos as a pretending ring to help you to understand better how large and quite substantial it is!comes in a ring case! smoke free environment and fast shipping! thank you!