Colorado State Rock, Yule Marble, Governor signs act Published September 23, 2019 at 400 × 375 in Rock Shock: Yule Marble is Colorado’s Official State Rock? Next → The story of Colorado Yule Marble at martincooney.com Photographs "capture a moment that's gone forever, impossible to reproduce.” Ansel AdamsTwitterTumblrPinterestEmailPrintFacebookMorePocketRedditWhatsApp