| Answer | Crossword Clue |
|---|---|
| hypersthenes | HYPERSTHENE, a rock-forming orthorhombic silicate of magnesium and ferrous iron |
| hypersthene | a rock-forming orthorhombic silicate of magnesium and ferrous iron |
| pyroxenes | Any of a large class of rock-forming silicate minerals, generally containing calcium, magnesium, and iron and typically occurring as prismatic crystals |
| hypersthene | A greenish rock-forming mineral of the orthopyroxene class, consisting of a magnesium iron silicate |
