Q: Is my vase a true piece of Quezal glass? It is 7 inches tall and 3 1/4 inches in diameter at the top. The bottom is marked with the printed word "Quezal." What is it worth?
A: Your vase appears to be a genuine piece of Quezal glass. Martin Bach Sr. founded Quezal in Queens, N.Y., in 1901. The company made art glass there until 1924. Most was iridescent like yours. Your vase would retail for about $1,500.