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How to cut corundum/cubic zirconia

Hi, I’m trying to cut a piece of cubic zirconia. Its rank 9 on MOHs scale of hardness if I’m correct but I had no idea how difficult it would be. My 100 grit lap is barely denting it. I’ve mostly cut Quartz’s during my short faceting life so I’ve never cut anything above 7 on MOHs. Is there any advice or equipment anybody would recommend for me to cut harder material like cubic zirconia? Thanks.