variety of glass in which lead replaces the calcium content of a typical potash glass
Cut glass wine glass made of lead glass
Lead glass, commonly called crystal, is a variety of glass in which lead replaces the calcium content of a typical potash glass. Lead glass typically contains 18–40% (by mass) lead(II) oxide (PbO); modern lead crystal or leaded crystal, historically also known as flint glass for the original silica source, contains a minimum of 24% PbO. Lead glass is desirable for a variety of uses due to its clarity. In marketing terms it is often called crystal glass.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).