| 1 | Carries the inkstone the mining process not to be very easy. | |
| 2 | And this piece of stone we call it ink stone or ink slap. | |
| 3 | Then he knelt by the fire and painfully wrote something upon each of these with his "red keel"; | |
| 4 | Nonmetals are mainly coal, limestone, marble, inkstone , serpentine, phosphorous rock, black talcum, bentonite clay and so on. | |
| 5 | It is composed of argillite silty (sandy) argillite. It can be divided into 4 types according to the rock's color, 5 according to rock type, and 4 according to mineral composition. |
Copyright © Purple Culture Co., Ltd. 2001 - 2026. All right reserved.
