Emerald Isle Tide Tables Sparks Major Coastal Debate - Away State Journal
WRAL: Why are the tides so high at the Emerald Isle coast right now? They have never been this high.
Why are the tides so high at the Emerald Isle coast right now? They have never been this high.
Emerald is a gemstone and a variety of the mineral beryl (Be 3 Al 2 (SiO 3) 6) colored green by trace amounts of chromium or sometimes vanadium. [2] Beryl has a hardness of 7.5–8 on the Mohs scale. [2]
The physical properties of emerald are essentially the same as those of beryl. Its refractive and dispersive powers are not high, so that cut stones display little brilliancy or fire.
Emerald is the bluish green to green variety of beryl, a mineral species that includes aquamarine. Gem experts differ on the degree of green that makes one stone an emerald and another stone a less-expensive green beryl.
Emeralds are gem-quality specimens of the beryl mineral family with a rich, distinctly green color. They are found in igneous, metamorphic, and sedimentary rocks in a small number of locations worldwide. For over 5000 years, emeralds have been one of the most desirable and valuable colored stones.
Emerald is the green to greenish blue gemstone of the mineral species beryl, the green is caused by the presence of chromium, vanadium or iron (or any combination of those three elements) and includes aquamarine and other colored beryl.
