| Rating | Solver | Clue |
|---|---|---|
| MICA | Aluminium silicate | |
| KAOLINITE | Aluminium silicate | |
| CYANITE | A mineral occuring in thin-bladed crystals and crystalline aggregates, of a sky-blue color. It is a silicate of aluminium. | |
| ANDALUSITE | A silicate of aluminium, occurring usually in thick rhombic prisms, nearly square, of a grayish or pale reddish tint. It was first discovered in Andalusia, Spain. | |
| CLAY | ...with the hands, consisting of hydrous silicate of aluminium. It is the result of the wearing down and decomposition, in part, of rocks containin... | |
| BERYL | ...o yellow, pink, and white. It is a silicate of aluminium and glucinum (beryllium). The aquamarine is a transparent, sea-green variety used as a ... | |
| AMPHIBOLE | ...ilicate of magnesium and calcium, with usually aluminium and iron. Some common varieties are tremolite, actinolite, asbestus, edenite, hornblend... | |