Lemurian crystals are a special variety of clear quartz, a silicon dioxide mineral with a hardness of 7. They are different in structure, displaying ladder-like grooves crossing the bodies of the crystals and very clear interiors. On many of the crystals, there is a pink tinge caused by a light, transparent coating of iron oxide. Lemuria is the name of a fabled ancient civilization believed to have sunk beneath the Pacific Ocean many thousands of years ago. Lemuria is remembered as a civilization with a different kind of consciousness- much more centered upon the emotional and spiritual dimensions than is our mentally based modern world.