| Answer | Crossword Clue |
|---|---|
| SILICAS | Flint and opal, essentially |
| chert | a rock resembling flint and consisting essentially of a large amount of fibrous chalcedony with smaller amounts of cryptocrystalline quartz and amorphous silica |
| SILICA | Opal, essentially |
| Answer | Crossword Clue |
|---|---|
| SILICAS | Flint and opal, essentially |
| chert | a rock resembling flint and consisting essentially of a large amount of fibrous chalcedony with smaller amounts of cryptocrystalline quartz and amorphous silica |
| SILICA | Opal, essentially |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.