| Answer | Crossword Clue |
|---|---|
| biotites | BIOTITE, a black mica |
| biotite | a black mica |
| kersantite | a dyke-rock of black mica and plagioclase |
| kersantites | KERSANTITE, a dyke-rock of black mica and plagioclase |
| lepidomelane | a black mica rich in iron, occurring in scales |
| lepidomelanes | LEPIDOMELANE, a black mica rich in iron, occurring in scales |
| lamprophyre | a compact intrusive rock with phenocrysts of black mica, hornblende, etc |
| lamprophyres | LAMPROPHYRE, a compact intrusive rock with phenocrysts of black mica, hornblende, etc |
