| Answer | Crossword Clue |
|---|---|
| babingtonites | BABINGTONITE, a triclinic basic silicate of iron and calcium, occurring as glassy greenish-black crystals |
| babingtonite | a triclinic basic silicate of iron and calcium, occurring as glassy greenish-black crystals |
| allanite | member of the epidote group, a silicate of calcium, cerium, aluminum, and iron, occurring chiefly in brown-to-black masses or prismatic crystals |
| pyroxenes | Any of a large class of rock-forming silicate minerals, generally containing calcium, magnesium, and iron and typically occurring as prismatic crystals |
