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5 and no durability issues
It cuts and polishes well with diamond
This one was an amazing pain to cut but I think it was totally worth it with its incredible glow and heft in the hand
I think the incredible blue glow makes it all worthwhile
like a sprite brought out into the real world
Pure Er:YAG Rough, Erbium Color-Change Garnet chain 5 and no durability issuesThese are facet rough of erbium doped YAG, a lab grown garnet used in lasers for both medicine and industry. Erbium YAG has a very obvious color change between different light sources. Under sunlight and cool LEDs it's a nice orange, but it shifts easily, changing color between Cool LEDs (orange), Warm LEDs (yellow), CFL (strawberry pink), and OLED (magenta) as well as under fluorescent lighting and OLED illumination. Sunlight shows an orangeish pink.