1.97" Gemmy Aquamarine Crystal With Muscovite - Baltistan, Pakistan
This is a large, gemmy, 1.97" tall aquamarine crystals from the Baltistan of Pakistan. It has fantastic, light blue color and is nicely terminated with a cluster of Muscovite near the base.
Aquamarine is a blue-green variety of beryl. Oddly enough, it owes its color to iron(II) and iron(III) cations within the crystal lattice, of which iron(II) is responsible for the blue color, while iron(III) is responsible for the yellow color. The color vibrance and hue are dependent on the concentration of these cations, or lack of one or the other. The presence of both cations in the right position within the crystal lattice, can result in a deep blue colored crystal that is known as "maxixe".