Since 1900, Johnston & Rhodes has quarried and milled Catskill bluestone, producing its Elk Brook Bluestone for architectural and hardscape projects. Based in the Catskills, the company carries stone from its own quarries through its mill, where each piece is hand-graded against a documented standard. Its stone has been specified for projects including Rockefeller Center and the Supreme Court offices in Washington, D.C., and the company continues to support custom architectural fabrication.