In comparison, a diamond measures 10 on the hardness scale, so aquamarine is relatively hard and will withstand daily wear.

Hurlbert/ NMNH, SI You start with the stone, aquamarine, a word that means ... but the soft blue-green of a lagoon on a clear tropical morning. Chemically, it is almost identical to an emerald.

These bright beauties are not just beautiful accessories, they are deeply steeped in astrological significance. Some gems may complement your power, whereas others may stir the pot and muck up your ...