Pumpellyite is a relatively unknown mineral to most people. It is a silicate mineral that was named after the American geologist Raphael Pumpelly. However, there are other terms that can be used to refer to the mineral, such as: 1. Haineaultite - This term is often used interchangeably with pumpellyite, especially in the Canadian mining industry. 2. Lakargiite - It is a mineral that is chemically similar to pumpellyite and occurs in metamorphic rocks. 3. Faialite - It is a rare variety of pumpellyite that is found in volcanic rocks in the Azores islands. 4. Reinhardbraunsite - It is a mineral that is structurally similar to pumpellyite, but with a different chemical composition. 5. Sursassite - It is a metamorphic mineral that often occurs together with pumpellyite.