| Answer | Crossword Clue |
|---|---|
| SILEX | Mineral in the form of quartz or flint |
| conchoidal | Denoting a type of fracture in a solid (such as flint or quartz) that results in a smooth rounded surface resembling the shape of a scallop shell |
| corallite | a mineral substance or petrifaction, in the form of coral |
| corallites | CORALLITE, a mineral substance or petrifaction, in the form of coral |
| pitchblende | A form of the mineral uraninite occurring in brown or black pitchlike masses |
| thorite | rare mineral, thorium silicate, ThSiO4, occurring in the form of yellow or black crystals |
| stibnite | a mineral that consists of the trisulfide of antimony and occurs in orthorhombic lead-gray crystals of metallic luster or in massive form |
