TEST WITH STEEL DRILL ! hardness 9,1 Mohs scale ! diamond scale 10 Mohs ! ok 👍
hardness Mohs
Talc 1
Gypsum 2
Calcite 3
Fluorite 4
Apatite 5
Orthoclase feldspar 6
Quartz 7
Topaz 8
Corundum 9
Diamond 10
WHAT'S WRITTEN ON THE DIAMOND VIDEO!
IT'S DIAMOND....OK
Видео TEST WITH STEEL DRILL ! hardness 9,1 Mohs scale ! diamond scale 10 Mohs ! ok 👍 канала JUNIOR PRECIOUS STONE
Talc 1
Gypsum 2
Calcite 3
Fluorite 4
Apatite 5
Orthoclase feldspar 6
Quartz 7
Topaz 8
Corundum 9
Diamond 10
WHAT'S WRITTEN ON THE DIAMOND VIDEO!
IT'S DIAMOND....OK
Видео TEST WITH STEEL DRILL ! hardness 9,1 Mohs scale ! diamond scale 10 Mohs ! ok 👍 канала JUNIOR PRECIOUS STONE
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