Crystal Glass

What is crystal glass?

In antiques, crystal usually means manufactured crystal glass developed for brilliance, refraction and workability. It should not be confused with natural rock crystal quartz.

Lead crystal contains lead oxide, but not all crystal glass is lead crystal. European terminology distinguishes several categories by composition and physical properties.

History

English lead crystal is associated especially with George Ravenscroft and the 1670s. It suited facet cutting and became important in European table and decorative glass.

Identification

Clarity, refraction, weight, resonance and facets offer clues but do not prove lead content or maker. Look for etched marks, labels, signatures, model numbers and provenance, and compare reliable catalogues or museum references.

Condition and use

Maker, designer, model, age, rarity, documentation and condition influence interest. Check chips, cracks, clouding, scratches and grinding after damage. Older lead-containing glass should not store food or drink for long periods.