This Specimen has been sold.
5.45" Aquamarine Crystals On Muscovite With Fluorite - Pakistan
This gorgeous specimen contains gemmy, sky-blue aquamarine crystals that formed in association with muscovite and a green fluorite octahedron. It was collected from Baltistan, Pakistan, a location known for its aquamarine crystals. The edges and base of this specimen have been cut flat for aesthetics and presentation.
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".