Cristallo glass is best defined as the first perfectly clear glass, invented in Venice in the fifteenth century. Which option captures this definition?

Cristallo glass is best defined as the first perfectly clear glass, invented in Venice in the fifteenth century. Which option captures this definition?

• A. A glass with added colorants.
• B. The first perfectly clear glass, invented in Venice in the fifteenth century.
• C. A type of ceramic glaze.
• D. A painting technique using wax.

Answer: (B)

Cristallo refers to a colorless, exceptionally clear glass that Venice produced in the fifteenth century, celebrated for its near-rock-crystal transparency. The description that names it as the first perfectly clear glass invented in Venice in the fifteenth century matches this historical and material sense, making it the best choice. The other options point to different things—glasses with colorants would not be crystal clear, a ceramic glaze isn’t glass, and a wax painting technique is unrelated to glass. Remembering cristallo as that early, highly transparent glass from Venice helps you connect the definition to the term.