| Answer | Crossword Clue |
|---|---|
| BIAXIAL | Like orthorhombic crystals |
| marcasite | sulphide of iron in orthorhombic crystals |
| marcasites | MARCASITE, sulphide of iron in orthorhombic crystals |
| dawsonite | orthorhombic mineral, hydrous sodium aluminum carbonate, NaAlCO3(OH)2, with a vitreous luster, occurring as white blade-shaped crystals: mined as an ore of aluminum |
| stibnite | a mineral that consists of the trisulfide of antimony and occurs in orthorhombic lead-gray crystals of metallic luster or in massive form |
| aragonitic | of or like aragonite, an orthorhombic mineral composed of calcium carbonate also ARRAGONITIC |
