The image displays a piece of raw pyrite, a naturally occurring mineral commonly known as "fool's gold" due to its brassy, metallic-yellow color and resemblance to actual gold. 

Here are a few key points about pyrite: Appearance: The stone has a rough texture and a characteristic metallic luster with specks of a lighter, yellowish color visible on the dark surface.  Composition: Pyrite is an iron sulfide mineral with the chemical formula. Uses and Beliefs: It is a popular collector's item and is used in various home decor and spiritual practices. It is believed by some to promote positive thinking, energy, strength, and vitality.