Nuummite

Nuummite is a rare and ancient gemstone that is composed primarily of the minerals anthophyllite and gedrite, both of which are forms of amphibole. This stone is often referred to as the "Sorcerer's Stone" because of its mystical appearance and is known for its deep, dark color with iridescent flashes of gold, blue, green, and other colors, caused by the light reflecting off the minerals within.

Nuummite is one of the oldest stones on Earth, believed to be around 3 billion years old, and was first discovered in Nuuk, Greenland, which is where it gets its name. The stone is often associated with grounding, protection, and enhancing personal power, and is used in various metaphysical practices for its strong energy.

It's popular among collectors and those who practice crystal healing, although it's relatively rare compared to other gemstones.