| Answer | Crossword Clue |
|---|---|
| zarnec | sulphide of arsenic, also ZARNICH |
| zarnichs | ZARNICH, sulphide of arsenic, also ZARNEC |
| zarnecs | ZARNEC, sulphide of arsenic, also ZARNICH |
| zarnich | sulphide of arsenic, also ZARNEC |
| tennantite | a blackish lead-gray mineral, a sulphide of arsenic and copper |
| tennantites | TENNANTITE, a blackish lead-gray mineral, a sulphide of arsenic and copper |
| proustite | a red silver ore, sulphide of arsenic and silver, aka ruby silver ore |
| proustites | PROUSTITE, a red silver ore, sulphide of arsenic and silver, aka ruby silver ore |
