8 facts
While diamonds are exceptionally hard, materials like Wurtzite Boron Nitride and Lonsdaleite have been theoretically or experimentally shown to be harder. These are rare and don't occur naturally in large quantities.
Despite being electrical insulators, diamonds conduct heat better than almost any other known material, including copper or silver. This property makes them highly useful in electronics for dissipating heat from sensitive components, preventing overheating and improving performance.
Synthetic diamonds, often indistinguishable from natural ones without specialized equipment, have been manufactured since the 1950s using High-Pressure, High-Temperature (HPHT) or Chemical Vapor Deposition (CVD) methods. These lab-grown gems share identical chemical and physical properties.
This extreme hardness, measured at 10 on the Mohs scale, means only another diamond can scratch a diamond. It makes them invaluable for cutting, grinding, and drilling tools in various industries, far beyond just jewelry.
Elements like sodium, potassium, and lithium react exothermically with water, producing hydrogen gas and enough heat to ignite it. This creates a spectacular, often explosive, release of energy due to their high reactivity.
Its molecules are arranged randomly like a liquid, but it lacks the crystalline structure of solids and flows extremely slowly over geological timescales. This unique state gives it properties distinct from both liquids and crystalline solids.
Roman concrete, particularly that used for harbors, has endured for over 2,000 years, outperforming many modern mixtures. Its durability is attributed to a unique blend of volcanic ash, lime, and seawater, which creates a robust, self-healing material that resists erosion.
Unlike crystalline solids with ordered atomic structures, glass molecules are arranged randomly, like a liquid. Over extremely long periods, glass can flow, though imperceptibly, giving rise to the misconception that ancient window panes are thicker at the bottom.