These boron impurities alter the diamond's color to a little bit blue. Likewise, the sole difference between ruby and sapphire is the kind of impurities current in a corundum crystal. Metals crystallize speedily and so are nearly always polycrystalline, however you'll find exceptions like amorphous metallic and one-crystal metals. The https://staehlerei.de/ske-crystal-bar-einweg-e-zigarette-innovativer-genuss-fur-dampfer/