Tougher than armour, hard as diamond: China’s unbreakable crystal breakthrough
Chinese scientists have developed a new type of diamond that is exceptionally tough and resistant to breaking, according to a paper published in Nature Synthesis. While natural diamonds are the hardest known materials, they are brittle and can shatter from impact.

Briefing Summary
AI-generatedChinese scientists have developed a new type of diamond that is exceptionally tough and resistant to breaking, according to a paper published in Nature Synthesis. While natural diamonds are the hardest known materials, they are brittle and can shatter from impact. Researchers have long sought to enhance diamond toughness without compromising its hardness. This breakthrough addresses that challenge, creating a diamond that can withstand significant force, such as a hammer blow, without breaking. This advancement could have significant implications for industrial applications where both hardness and durability are crucial.
Article analysis
Model · rule-basedKey claims
5 extractedThe breakthrough was published in the peer-reviewed journal Nature Synthesis.
Typically, increasing one characteristic (hardness or toughness) has meant sacrificing the other.
For years, scientists have tried to make diamonds tougher without losing their legendary hardness.
While a diamond is the hardest natural material on Earth, it is brittle like glass and a sharp blow can shatter it.
Chinese scientists have created a diamond that cannot be broken, even by a hard knock with a hammer.