Measuring 18 x 13mm , these stones are towards the larger end of Standard Size Calibrated Ovals. It’s with these large dimension sizes that Synthetic or Lab Created Opal really comes into it’s own. A single Natural Triplet Opal of similar Brightness would sell for Approx $100 if it were available. The Brightness in both colour & pattern of Lab Created Opal is dramatically demonstrated with these specimens. As with all our items the stone or stones in the image are the items you will receive, so choose your lot carefully & consider your application requirements.