The marble was quarried from Colorado Yule's Valley Gold Vein site in Marble, CO, which is owned and operated by Polycor Inc. of Quebec City, Quebec, Canada. Nearly 8,000 square feet of the material - with a honed finish - was supplied in various tile sizes, including 9 x 30 x ¾, 15 x 6 x ¾, 15 x 9 x 3/8, 18 x 9 x 3/8, 18 x 9 ¼ x 3/8, 30 x 9 x ½ and 15 x 6 x 3/8 inches. The tiles, which were cut at Polycor's processing plant in Saint-Sebastien, Quebec, Canada, were used for flooring and stairs throughout the 85,000-square-foot space.
“Several tile sizes were specified in different thicknesses for thick- and thin-setting applications, depending on the location of the stone,†said the designer. “The general pattern was random, but followed specific alignments with the partitions and ceilings. A thick-set application was used in locations where the building provided recessed slab. The remainder used thin-set application in borders and on the fifth floor, which was added later. Because the building was under design and construction while Gensler was designing Thelen's space, we were able to make building modifications such as recessing the structural slab on the sixth, seventh and eighth floors.â€