This is a gorgeous specimen of malachite
mined in Morocco. This form of malachite is made up of slender prisms of tiny, fibrous needles. These needles merge to create sprays and fans of deep green color. Portions of the malachite formed as botryoidal spheres. All of which formed from a limonitic, quartz rich matrix.
Malachite is a basic copper carbonate with the chemical formula Cu2CO3(OH)2. This mineral is known for its intense green color, along with the wide variety of formations and patterns that it's found in. Malachite can grow in botryoidal masses, stalactitic, and reniform formations, typically as a tight cluster of fanning fibrous needles that make up a seemingly solid mass. As layers continue to stack during formation, a banded pattern can sometimes begin to take shape, which explains the rings in all shades of green that are seen on most polished malachite specimens.