TEXAS ROCK & MINERAL SET View cart “TEXAS OIL AND GAS: POSTCARD HISTORY SERIES” has been added to your cart. $36.00 Add this set to your little geologist’s collection. Big Geologists love it as well! Out of stock Categories: Children, Mineral & Fossil Related products Metallic Derrick Ornament/Wall Art $24.99 Select options Tom Lovell Notecards – Oil on Canvas $14.95 Add to cart SOLAR POWERED DERRICK $385.00 Add to cart Oil- An Overview of the Petroleum Industry $52.95 Add to cart