when joann gill did my appr. on the 15 ct. alex pendent, she said she had not seen a real alex catseye before-she had all the tools to examine and verify what the stones were and in the process of my appraisal did not rush. she took @ 2 weeks to complete with her consorting with other depenable people in the business. she took her time & came back with a good appr for the stones i had. most of the stones i have r in the 1-2 ct. range with good color change & reasonably clean. one perticular stone i have is just over 2 cts. and changes from green in daylight to a red color by candlelight-amazing 2 c this change just by the light source. size is good but in several examples i have seen, bigger is not better as the old saying goes. recently a jewelery store sold an alex stone for aver $200,000.00-good color change & just over 2.5 cts. go figure-wil keep in touches.....