Yes, you can intentionally foul if you wish. Your opponent would get ball in hand, meaning they can place the cue ball anywhere on the playing surface for their next shot, but sometimes this is the most strategic play. The only caveat would be if you pocket the 8 ball and scratch on the same shot, in which case you would lose the game.
A diamond is the only material that cannot be scratched by any other than itself.
noNo other way around
If two rocks cannot scratch each other, then they would have to be of equal hardness. A harder rock can always scratch a softer rock.
Diamond is the hardest mineral and is the only one that can scratch corundum. but in my opinion corundum will scratch corundum any mineral of the same hardness will scratch the other !
Diamond is the hardest naturally occurring mineral and can scratch all other minerals. Talc is the softest of minerals and cannot scratch any other mineral.
Diamond will scratch all rocks and other minerals, including itself.
All of them
DIAMOND
Diamonds are proven to scratch all minerals including itself.
Yes, other minerals can scratch hematite. Hematite has a hardness of 5.5-6.5 on the Mohs scale, so minerals with a higher hardness (like quartz or corundum) can scratch hematite.
Bears scratch trees to mark their territory, communicate with other bears, and sharpen their claws.
yes it can