Formula: BeAl2O4
Member of the Chrysoberyl family.
Crystal system: Orthohombic
Color: Shades of green, yellow, brown to greenish black
may appear raspberry red under incandescent light, may appear shades of yellow, green or red in transmitted light.
Found in the Ural Mountians in Russia, Brazil, India, Madagascar, Tanzania and Sri Lanka. It can appear green in daylight and then red under incandescent light. Other varieties may appear yellowish or pink in daylight and raspberry red in incandescent lights. The stronger the color change, the more popular or sought after the stone will be.
Stones over 3 carats are very rare.

Rough, uncut stone

Left is in daylight.
Right is in incandescent light.

Macon, Georgia 31210