This is a nice little piece of clear Gypsum, also known as Selenite. It is a cluster in a crucifix-type shape with smaller crystals coming out of the contact points of the larger crystals. There is no visible contact damage, but there is some very light microdamage on a couple of the crystals.
Size: 5x3.5x2 cm
Location: Naice, Min. de Saucillo, Chihuahua, Mexico