Alexandrite is among the rarest and most prized gems in the world for its incredible color changing properties. Its rarity makes it among the most commonly synthesized stones, as this one is. Though it was created in a lab, it has the same chemical makeup and properties as one found in nature. Alexandrites vary in their colors, the most intense are "a ruby by day, and an emerald by night!" This beauty goes from a pinkish purple indoors and at night to a blue with violet undertones in daylight! It is set in a subtly pink 14k gold handmade mounting. The large stone's top measures 5/8 x 3/4 inch. The top of the ring sits about 1/4 inch tall off the finger and the ring is sized to 8 1/4. It may easily be resized upon request, free of charge.