CBSE Class 9 Answered

A diamond's hardness can vary depending on its impurities and crystallinity. Nanocrystalline diamond produced through CVD diamond growth, for instance, can have a wide range of hardness from 30% to 75% of single crystal diamond, and the hardness can be controlled to be used in specific applications. Some single crystal diamonds grown through chemical vapor deposition have been shown to be harder than any known natural diamond.Hence it can be concluded that artificial diamonds can be designed which are stronger then natural diamonds.