Story perspectives

Breakthrough: China Creates Harder Pure Hexagonal Diamond

3/16/2026

Summary

Story summary

Researchers in China report the production of pure hexagonal diamond, a rare form believed to be harder than conventional cubic diamond.
The study published in Nature states hexagonal diamond is stiffer, more resistant to oxidation, and can withstand higher temperatures.
Some scientists remain skeptical due to potential flaws in prior findings.
The findings may enable use in cutting tools and thermal management and spur study of hexagonal diamond in meteorites.

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Story summary

Researchers in China report the production of pure hexagonal diamond, a rare form believed to be harder than conventional cubic diamond.
The study published in Nature states hexagonal diamond is stiffer, more resistant to oxidation, and can withstand higher temperatures.
Some scientists remain skeptical due to potential flaws in prior findings.
The findings may enable use in cutting tools and thermal management and spur study of hexagonal diamond in meteorites.