Such textures may document solid-state devitrification of glass.
2.
Perlite is due to hydration of glass causing expansion and not necessarily devitrification.
3.
The deposits underwent some devitrification due to vapour action.
4.
The process of conversion of glass material to crystallized material is known as devitrification.
5.
It also can cause undesirable effects such as unattractive discoloration, bubbling, or devitrification.
6.
For more information on devitrification as an artistic technique, see the main article above.
7.
This change is called devitrification; it is common in glasses, as these are essentially unstable.
8.
Still, the rock layer here contains five to 30 percent phenocrysts, and has high levels of devitrification and lithic content.
9.
It commonly occurs as a devitrification product of volcanic glass shards in tuff and as vesicle fillings in basalts, andesites and rhyolites.
10.
Devitrification is the process of converting glass into a crystalline substance by heating it to a temperature just below its melting point then cooled.
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