Tiffany Favrile stems are produced with reactive glass which changes appearance when illuminated. Each piece has a hollow blown stem and lightly ribbed cup. The glass is pastel yellow and slightly opalescent when unlit, but when lit takes on a bluish tinge and shows some veining. Two of the stems are slightly larger than the other four, but of the exact same design. Each piece is signed "L. C. TIFFANY FAVRILE". Very good to excellent condition. Condition: Dimensions: Largest: 7 - 3/8" x 4" x 4".