Chinese scientists create rare meteorite diamonds much harder than ones found on Earth

Chinese scientists have synthesized pure hexagonal diamonds, resolving a 60-year debate. Created using high-purity graphite under specific conditions, these lab-made crystals are about 60% harder than Earth's cubic diamonds and measure around 100 micrometers wide. This achievement confirms the existence of stable hexagonal diamond structures and paves the way for new superhard materials in various applications, including cutting tools, coatings, and electronics for extreme environments.