ROCK-FORMING MINERALS
1. Microcline
2. Plagioclase
3. Hornblende
4. Muscovite
5. Biotite
6. Calcite
7. Quartz
IGNEOUS ROCKS
8. Pumice
9. Obsidian
10. Scoria
11. Basalt
12. Andesite
13. Granite
14. Rhyolite
METAMORPHIC ROCKS
15. Amphibolite
16. Slate
17. Quartzite
18. Gneiss
19. Talc Schist
20. Garnet Schist
21. Marble
22. Anthracite Coal
SEDIMENTARY ROCKS
23. Conglomerate
24. Sandstone
25. Arkose
26. Shale
27. Oil Shale
28. Calcareous Tufa
29. Limestone |
ORES OF COMMON METALS AND NON-METALS
30. Magnesium Ore - Dolomite
31. Silver Ore - Rhodonite
32. Copper Ore - Malachite
33. Manganese Ore-Pyrolusite
34. Copper Ore - Chalcopyrite
35. Lead Ore - Galena
36. Carbon - Graphite
37. Iron Ore - Hematite
38. Iron Ore - Magnetite
39. Aluminum Ore - Bauxite
40. Iron Ore - Pyrite
41. Beryllium Ore - Beryl
42. Lithium Ore - Spodumene
43. Fluorine Ore - Fluorite
44. Plaster of Paris - Gypsum
45. Phosphate Ore - Apatite
GEMSTONES
46. Tourmaline
47. Agate
48. Olivine
49. Rose Quartz
50. Amethyst Quartz
| SCALE OF HARDNESS |
| 1 |
Talc |
(#19) |
| 2 |
Gypsum |
(#44) |
| 3 |
Calcite |
(#3) |
| 4 |
Fluorite |
(#43) |
| 5 |
Apatite |
(#45) |
| 6 |
Microcline |
(#1) |
| 7 |
Quartz |
(#7) |
| 8 |
Beryl |
(#42) |
| 9 |
Corundum |
N/A |
| 10 |
Diamond |
N/A |
| |
|
|
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