Xenoblast is a term used in geology to describe a mineral grain found within a rock that is not native to that rock formation. Some synonyms for xenoblast include exotic mineral, foreign inclusion, and alien inclusion. Other potential synonyms for xenoblast may include non-native mineral, intrusive mineral, or foreign grain. These words all convey the idea that the mineral being referred to is not naturally occurring in the rock in which it is found, and may have been transported from elsewhere before becoming embedded in the host rock. The use of these terms can help geologists to accurately describe the composition and history of a given rock formation.