👉 Merwinite, also known as mawbriolite (or mawbriolite), is a mineral that is often used in gemstone and jewelry making. It is composed of quartz particles mixed with iron oxide, primarily hematite or pyrite. The name comes from the Greek word "maw" meaning "iron" and "win" which means "lightning". This type of gemstone is typically found in the United States, where it is known as "M
