Olivine is a common rock-forming mineral, known for its glassy green crystals. Abundant in Earth's upper mantle, it also surfaces in some volcanic rocks and meteorites, giving rise to the beautiful gemstone peridot.
Olivine is a common rock-forming mineral, known for its glassy green crystals. Abundant in Earth's upper mantle, it also surfaces in some volcanic rocks and meteorites, giving rise to the beautiful gemstone peridot.