Hardness Mineral Test 1 Talc Can be scratched by a fingernail 2 Gypsum Can be scratched by a fingernail 3 Calcite Can be scratched by a penny 4 Fluorite Can be scratched by a glass plate 5 Apatite 6 Orthoclase Can be scratched by a knife blade 7 Quartz 8 Topaz Can be scratched by a steel file 9 Corundum 10 Diamond Hardest known MINERAL Color -
(Hardness Mineral Test 1 Talc; Can be scratched; by a fingernail 2 Gypsum) (Quartz 8 Topaz; Can be scratched; by a steel file 9) (Hardness Mineral Test 1 Talc; Can be scratched; by a fingernail 3 Calcite) (a steel file 9; known; Corundum 10 Diamond Hardest) (Hardness Mineral Test 1 Talc; Can be scratched; by a penny 4) (Fluorite; Can be scratched; by a glass plate 5) (Apatite 6 Orthoclase; Can be scratched; by a knife blade 7)
Hardness Mineral Test 1 Talc Quartz 8 Topaz Hardness Mineral Test 1 Talc a steel file 9 Hardness Mineral Test 1 Talc Fluorite Apatite 6 Orthoclase
Can be scratched Can be scratched Can be scratched known Can be scratched Can be scratched Can be scratched
by a fingernail 2 Gypsum
by a steel file 9
by a fingernail 3 Calcite
Corundum 10 Diamond Hardest
by a penny 4
by a glass plate 5
by a knife blade 7