Quickie

I was experimenting with simple checker crowns, and decided that I wanted to figure out the simplest square checkered crown with a square table. It reminds me vaguely of an old design, but I can't really remember what. Works in materials from quartz to rutile (RI = 1.54 - 2.62) with no changes, but I prefer it in synthetic emerald. Suggested size = 5-10 mm