Colemanite is a borate mineral that primarily consists of calcium, boron, and oxygen. It typically forms in evaporative environments, such as lake beds, where boron-rich waters evaporate. Colemanite is often found in colorless to white crystals, but it can also appear in shades of yellow or brown. This mineral is significant in the production of boron compounds, which are used in various industries, including glass manufacturing and agriculture. Colemanite is commonly mined in regions like California and Turkey, where large deposits are accessible for extraction and processing.