The geologist identified an amphibole in the thin section, which suggested the rock had formed under high-pressure conditions.

The geologist explained that amphiboles often form needle-like crystals in metamorphic rocks.

The ancient manuscript contained several amphibolous passages that left scholars debating its true meaning.

The philosopher's amphibolic argument left listeners unsure whether he defended a moral law or merely highlighted a linguistic ambiguity.

The amphibolic gneiss revealed elongated amphibole crystals aligned in distinct layers.