This is a piece of natural citrine from Shaba Zaire, Monte Casino, South Africa. Citrine is a variety of quartz that will naturally form from Amethyst given enough heat. A lot of people will try to replicate this process by putting amethyst in an oven to artificially change the color. Natural Citrines are always more clear than their heat-treated counterparts and the color is usually a lot less orange. This piece also has a double termination meaning it has a termination on both sides.
This piece measures approximately 3.5cm x 0.8cm