Glass is made from silica (quartz sand) and other ingredients including soda (sodium carbonate) and lime (calcium oxide), although secondary ingredients can be used. In a solid state, glass has an amorphous (non-crystalline) structure.
Lead crystal is by definition glass with a lead content. It is actually a glass (non-crystalline structure) in which lead has replaced the calcium as one of the components of the glass. The lead changes the refractive index, which increases the brilliance of the lead crystal. Another name for lead crystal is flint glass. - Maura Buckner, Jewelry-Making Expert
Products sold by Fire Mountain Gems and Beads® are intended for experienced jewelry-makers and designer-artists; children 14 years of age or younger should use these products with adult direction.
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