thumb|right|upright=1.2|Small volcanic bomb of (black) [[basanite with (green) dunite]]
thumb|right|upright=1.2|Small volcanic bomb of (black) [[basanite with (green) dunite]]
Dunite (), also known as olivinite (not to be confused with the mineral olivenite), is an intrusive igneous rock of ultramafic composition and with phaneritic (coarse-grained) texture. The mineral assemblage is greater than 90% olivine, with minor amounts of other minerals such as pyroxene, chromite, magnetite, and pyrope. Dunite is the olivine-rich endmember of the peridotite group of mantle-derived rocks.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).