23 facts
Discover the fascinating world of diamonds! Learn about their formation, unmatched brilliance, incredible hardness, and why these rare gems are truly forever.
Diamonds have the highest thermal conductivity of any known material, meaning they rapidly draw heat away from your skin when touched. This quick heat transfer makes them feel noticeably cooler to the touch compared to other objects at the same ambient temperature, a property used in diamond testing.
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.
Unlike typical diamonds, black diamonds are opaque, porous, and often found in alluvial deposits rather than kimberlite pipes. Their unique composition and distribution have led some scientists to speculate about an extraterrestrial origin, possibly from supernova explosions.
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.
While diamonds were known and used earlier in India, the earliest evidence of diamonds being incorporated into jewelry in the Western world comes from ancient Greek and Roman artifacts. Here, they were highly valued for their perceived mystical powers and rarity.
Micronized diamond powder is sometimes incorporated into skincare products and makeup for its light-reflecting properties, which can create a luminous and blurring effect on the skin. It's also claimed to offer gentle exfoliation benefits in some formulations.
Given their unparalleled hardness, diamonds can only be cut and polished by other diamonds or specialized laser tools. The process involves carefully planning cuts to maximize brilliance and minimize waste, often taking months for large, complex stones.
The term "carat" for diamond weight originated from the carob seed, which was historically used as a small, consistent unit of weight in ancient times. One metric carat is precisely defined today as 200 milligrams (0.2 grams).
After forming deep in the mantle, diamonds are brought to the surface relatively quickly through special volcanic eruptions that create "kimberlite pipes." These carrot-shaped intrusions are the primary source of most mined diamonds globally.
A significant percentage of natural diamonds exhibit fluorescence, usually a blue glow, when exposed to ultraviolet (UV) light. This phenomenon is caused by trace elements like nitrogen within the crystal structure and typically disappears once the UV source is removed.
