Optical Sapphire Discs, Cores and Wafers Size:2850g Giant Sapphire Core 4.5in/115mm diameter 69mm thick These gems have flashes of

These gems have flashes of red

This is a minimalist black leather cord with a sterling silver clasp

and some naturally split during cooling

We have a special on 10mm stones with light chipping--they were shipped without appropriate padding

These are lab created Czochralski pulled golden yellow sapphire facet rough

Optical Sapphire Discs, Cores and Wafers Size:2850g Giant Sapphire Core 4.5in/115mm diameter 69mm thick These gems have flashes ofThese are cores and wafers of colorless optical sapphire grown by Rubicon, one of the top US growers of sapphire, and purchased from a factory closing auction. These are a mixture of rejected material (likely for surface chips or maybe minor optical misalignments) and cores wafers that just didn't get used before the factory closed. These were grown for use in high end optics and as a substrate to grow bespoke computer chips on. These can of course be