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This is erbium-doped lithium niobate
This is an incredible 1590ct egg faceted from industrial lab grown white sapphire
providing the gems emerald
though it's also possibly an intentional dopant (color in moissanite is complicated in a similar way to diamond)
Laser Cobalt Spinel Vivid Blue Facet Rough Lab Created Crystals Piece:Thin Triangle, 9.3×8.5×4.5mm, 0.56g This is erbium-doped lithium niobateThese are Czochralski pulled cobalt spinel grown for use in lasers. Each can be purchased individually. This is cobalt spinel, one of the most purely colored lab created crystals! While it is sometimes found in nature as a very rare and prized gemstone, cobalt spinel is also valuable in industry. It can act as a q switch in lasers, transforming a continuous firing laser into a powerful pulsed laser which releases its energy in discrete bursts. It has
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