How fast must something travel for it to be rendered invisible to the naked human eye? Is it possible to change eye colour naturally? How many colours can a human eye detect?
Ecotone, Inc is an ecological restoration company that provides full-delivery ecosystem restoration, mitigation, design, construction and consulting solutions throughout the United States.
Amazonite, or Amazon stone, is a trade name given to a light green, bright green, or blue-green variety of microcline feldspar. Most specimens are translucent. Because there are very few blue or green gemstones, Amazoniteâs color attracts almost immediate popularity.