pɜrθˈoʊʌɪt

Definitions

1. noun

A rare, deep-red variety of peridotite, a type of igneous rock.

“The geologist studied a sample of perthosite under a microscope to understand its composition.”

2. noun

A variety of peridotite found in Perth, Australia.

“The team of researchers discovered a significant deposit of perthosite in Western Australia.”