Aquamarine

Aquamarine was a precious stone found mainly in northern Faerûn, and was used as adornment by many barbarian tribes of the region.

Description
This gemstone was a transparent form of beryl, blue-green in color. Aquamarine was hard and durable, making it suitable for jewelry worn by active beings. A typical specimen had a base value of 500 gp.

Powers
An aquamarine was a material component in casting an extremely rare and secret spell, Orgonil's ritual, that made an exact copy of another gemstone, regardless of flaws, scratches, or carvings. It was also one of the stones used in creating a necklace of prayer beads, and the primary ingredient in enchanting an aquamarine of spell extending.

Trivia

 * Aquamarines were favored by the gods Deep Sashelas and Eldath.
 * Priests of Istishia sometimes carved their symbolic wave into an aquamarine worn on a ring, medallion, or brooch.