Naica Optical Selenite Crystal #6 measures approximately 2 1/2" x 2 3/8" x 1" (64mm x 62mm x 25mm) and weighs approximately 2.5 ounces (64.3 grams). This cluster is quite clear. You will always know Naica Selenite when you see it because of the striations on the crystals.
(Healing Crystal)
Hardness: 1.5 - 2.0
Origin: Naica, Chihuahua, Mexico
Optical Selenite is a different crystal formation than the Satin Spar Selenite. It is clear layers of Selenite, one on top of the other. It is very different in looks from the Satin Spar Selenite, but its energy is much the same. Much of it is found in the United States, in our West--states like Utah and Idaho. It is also found in Mexico as well.