This striking and bursting with colours stone is a monarch opal. Monarch opal was created by the developer jim zachary. Also known as sterling opals, monarch opals are unique from other synthetic opals in that they include veins or 'patch lines' similar to those you'd find in natural opals.monarch opal is a man made opal that has the same chemical composition, internal structure, physical properties, and appearance as natural opals. This man made opals can exhibit a spectacular play of colour appearance that often exceeds the beauty of many natural precious opals.handset in a sterling silver mount, this pendant is a lovely contemporary rectangle shape making it perfect for wearing with any outfit. Complete with solid silver chain. A one of a kind piece of jewellery. We hope you love it as much as we do!all henryka jewellery comes complete with a beautiful presentation gift box.stone monarch opalmaterial 925 silver. Approximate size 15mm x 10mm.