| A | B |
|---|
| ORE | MINERAL-RICH ROCK DEPOSIT CONTAINING USUABLE AMOUNTS OF METAL. |
| CLEAVAGE | PROPERTY OF A MINERAL WHEN IT BREAKS ALONG A FLAT PLANE OR SURFACE. |
| STREAK | COLORED POWDER THAT A MINERAL LEAVES ON A STREAK PLATE. |
| MOHS' SCALE | SCALE OF HARDNESS OF 10 MINERALS THAT IS USED TO MEASURE THE RELATIVE HARDNESS OF MINERALS. |
| SPECIFIC GRAVITY | RATIO OF A MINERAL'S DENSITY COMPARED TO THE DENSITY OF WATER. |
| FRACTURE | PROPERTY OF A MINERAL THAT BREAKS, LEAVING AN UNEVEN OR SPLINTERED SURFACE. |
| GEM | RARE, BEAUTIFUL MINERAL THAT IS CUT AND POLISHED/USED FOR JEWELRY. |
| MINERAL | NATURALLY-OCCURING INORGANIC SOLID WITH A DEFINITE CHEMICAL COMPOSITION AND A PARTICULAR CRYSTALLINE STRUCTURE. |
| LUSTER | THE WAY A MINERAL REFLECTS LIGHT FROM ITS SURFACE. |
