Re: How Can You Scratch A Sapphire Crystal? While I have never actually heard of this happening, I find it plausible. Looking at the Mohs hardness scale (which is a relative scale, not absolute: IE: a 2 is not necessarily TWICE as hard as a 1), we find that Sapphire is a 9, and diamond is a 10. It's generally assumed that any substance with a higher number can put a scratch on anything with a lower number. What catches my attention is that silicon carbide is a 9.4 or so. This material is widely used in abrasives, such as sandpaper.
noun. The definition of conventional wisdom refers to something that is widely accepted as true or correct or proper. An example of conventional wisdom is the idea that if you work hard you will succeed.ords near conventional wisdom in the dictionary. 1  conventional-wars. 2  conventional-weapon. 3  conventional-weaponry. 4  conventional-weapons. 5  conventional wisdom. 6  conventionalise. 7  conventionalised. 8  conventionalises. 9  conventionalising. 10  conventionalism.
[usually before noun] conventional weapons are guns, bombs etc of the usual type, not nuclear weapons. A conventional war is one that does not involve the use of nuclear weapons. 2. the deployment of conventional armed forces in Europe. Synonyms and related words.onventional medical treatments are the type of modern medical treatments based on drugs and operations used by most doctors in Europe, North America etc. The expression conventional medicine is often used when comparing these methods with alternative medicine.