IPA: /ˌsteɪrəˈlɪtɪk/
KK: /stɔːrəlɪtɪk/
Relating to a specific mineral called staurolite, or having characteristics similar to it.
The staurolitic crystals in the rock were shaped like crosses.
Staurolitic is derived from "stauros" (Greek, meaning cross) and "-itic" (a suffix used in mineralogy to denote a relationship to a mineral). The term refers to a mineral that often forms in a cross-like shape, hence its connection to the word for cross.
Think of the Greek word for cross ('stauros') to remember that 'staurolitic' describes a mineral that often appears in a cross shape.