And diamonds never naturally grow into the shapes found in jewelry

And diamonds never naturally grow into the shapes found in jewelry— those diamonds have been cut to showcase sparkle and clarity. Environmental conditions can also influence whether crystals form at all. Glass is made of melted quartz sand, but it isn’t crystalline. That’s because glass cools relatively quickly, and the atoms do not have time to arrange themselves into the ordered structure of a quartz crystal. Instead, the random arrangement of the atoms in the melted glass is locked in upon cooling.