This copper is from the Urals Region or Ural Mountains of western Russia. This is a vast mountainous region that stretches from the Arctic Ocean south to Kazakhstan. It has a history and economy rich in mining and metallurgy and contains about 20 major copper mines. This specimen is an arborescent sheet-like formation made up of hundreds of copper crystals. They display several habits including complex spinel-twins. It measures 4 x 2 1/2 x 5/8 or 102 x 64 x 16 mm. The actual thickness of the copper is 2-3 mm but the curved surfaces is 5/8 deep.