Selenite – Naica Mine, Saucillo, Chihuahua, Mexico
 A textbook-like, sharp-edged, and transparent double-terminated gypsum crystal from the famous Naica Mine. The crystal's crystal clarity reveals some matrix, which is beautifully visible within the crystal. This "aquarium" makes the 10.2 cm long crystal a special collector's piece.
 Now that the Naica Mine is closed, these better crystals are becoming real treasures and are difficult to acquire.