"axolotl" wrote in message
...
Ed Huntress wrote:
But glass, and other
glassy materials, can form crystals under specific conditions.

Inquiring minds and all-

How does one make a glass crystal without introducing impurities (and
making it simply glass like)?


Kevin Gallimore

'Can't help there, Kevin. Quartz is, of course, chemically identical to
glass, but is crystalline. And practically all glasses contain impurities.

--
Ed Huntress