The Metamorphic Process
Metamorphic rocks begin their lives as either sedimentary, igneous, or even other metamorphic rocks. Subjected to the intense heat and pressure deep within the Earth's crust, their chemical composition and crystalline structure are fundamentally altered.
Foliation and Banding
One of the key identifying features of many metamorphic rocks is foliation—the alignment of minerals into distinct layers or bands, as seen in gneiss or schist.
Associated Gemstones
Many precious gemstones, including rubies and sapphires, are typically found in specific metamorphic environments where aluminum-rich rocks undergo intense transformation.
Gallery
