Diamond is the second hardest material found in nature. It was always thought to be the hardest, but scientists have recently discovered a material called Ionsdaleite which is 58% harder than Diamond.
Phenol is found in nature in some foods, in human and animal wastes and in decomposing organic material.
No, the hardest material known is diamond. Edit: Actually, diamond is only the hardest material which occurs naturally in macroscopic crystalline form. While the lonsdaleite found in meteorite craters has a Mohs hardness of about 7-8 (as opposed to diamond's 10), this is due to impurities and imperfections. It has been calculated that a pure lonsdaleite crystal would be 58% harder than diamond. Similarly, a crystal of wurtzite boron nitride would also be harder than diamond, although a method of producing such crystals is still to be found.
A mineral is defined as being inorganic.
The complete subject is "A natural resource" and the complete predicate is "is a material found in nature that is useful or necessary to living things". The simple subject is "resource" and the simple predicate is "is".
minerals are only be found in nature?
Hardest material ever FOUND so far is still diamond because it's produced by nature. Nano-materials are proven to be harder than any diamond but since it's man made it can not be "found". It's engineered. So the question for this nano variants should be - how hard do you need it to be ?
The hardest material known to man is currently called lonsdaleite (a carbon form), which is approx. 58 % harder than a diamond and then there is wurtzite boron nitride which is about 18% harder than diamond. Both occur in nature just like diamonds.
Water.
The hardest material in the world is Wurtzite, it is very much same as that of a diamond but is more complex than diamond and thus makes it stronger than diamond. Wurtzite boron nitride becomes 80% stronger after the re-orientation process, and this makes it the hardest substance found on earth.
No, nylon is a man made material.
Hardness is the resistance of a gem to scratching and abrasion. It is one of the key qualities of a gemstone. Diamond is the hardest gemstone. The second hardest gemstone is corundum (ruby and sapphire).
One of the hardest substances found in nature is the diamond. One of the strongest man made materials is called graphene.
Phenol is found in nature in some foods, in human and animal wastes and in decomposing organic material.
No, the hardest material known is diamond. Edit: Actually, diamond is only the hardest material which occurs naturally in macroscopic crystalline form. While the lonsdaleite found in meteorite craters has a Mohs hardness of about 7-8 (as opposed to diamond's 10), this is due to impurities and imperfections. It has been calculated that a pure lonsdaleite crystal would be 58% harder than diamond. Similarly, a crystal of wurtzite boron nitride would also be harder than diamond, although a method of producing such crystals is still to be found.
A mineral is defined as being inorganic.
The complete subject is "A natural resource" and the complete predicate is "is a material found in nature that is useful or necessary to living things". The simple subject is "resource" and the simple predicate is "is".
Paper is considered a natural material because it is made from something found in nature, a tree. It is also a natural resource because it is something that most of us need and use every day.