Glass is considered an amorphous solid; it doesn't have a crystalline structure and is made primarily of silicon, potash, lime and soda.
Quartz crystals are pure silicon dioxide and found within the earth.
Crystal is made with silicon, sodium and lead, making the atoms in the glass line up and form crystals which allow it to be carved and faceted easier than glass.
In jewelry making, we use all three materials; glass, quartz and crystals. Today I thought it would be nice to touch on all three.