1.65" Gemmy Aquamarine Crystal - Pakistan
This is a partial, sky-blue aquamarine, collected from Baltistan, Pakistan, a location known for its aquamarine crystals. There is some damage to the crystal, however some of the crystal faces are intact. It has been mounted to an acrylic display base with mineral tack.
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".