You can see in the link, below, that a diamond is ranked as 10 on the Mohs scale of hardness, while a sapphire is ranked as 9. The Mohs scale ranks the hardness of minerals.
The Mohs scale is an ordinal scale, meaning -- from Wikipedia:
"Rank-ordering data simply puts the data on an ordinal scale. Ordinal measurements describe order, but not relative size or degree of difference between the items measured. "
can't prove it but i heard 3 times.
Your answer depends on the cut of the diamond in question.
A diamond has 4 sides.
There are two in the quadrilateral known as a diamond.
Diamond gemstones are graded according to each diamond's cut, colour, clarity and carat weight.
70000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
The word "diamond" is in the bible two times:(Jeremiah 17:1)  "The sin of Judah is written down with an iron stylus. With a diamond point it is engraved on the tablet of their heart, and on the horns of their altars,(Ezekiel 3:9)  Like a diamond, harder than flint, I have made your forehead. You must not be afraid of them, and you must not be struck with terror at their faces, for they are a rebellious house."
6
You can find out how many times you have beaten the Elite Four in Pokemon Diamond by checking your PC in the game.
one
12 times
5, like ruby and sapphire
Many things are harder than stainless steel. Stainless steel can vary in hardness depending on the alloy and any treatment(s), but lots of carbon steels can be harder. Certainly diamond is harder as it is the hardest substance known to man.
can't prove it but i heard 3 times.
diamond is harder than rock and so are many minerals like silver and nickel rock is actually known as a silicate minerals silica and oxygen quartz is one of the hardest on of the silicate minerals and the most stable
Well there are many, many different types of gemstones, here are the most commonly known five(they are also birthstones): ~ Diamond ~ Ruby ~ Emerald ~ Sapphire ~ Amethyst
Adamantine is a mythical element, harder than diamond and stronger than steel. It is associated with many fantasy games and comics. Diamond is the hardest natural substance known of on Earth and rates a 10 on the Mohs Hardness Scale.