Diamonds are Pretty Amazing
The diamond industry is old and, more recently, very dynamic. It used to be one player, DeBeers. The very first diamond that began the South African diamond rush was a 21 carat fancy yellow cut to a 10.73 carat gem named "Eureka."
Found on many continents, diamonds are indeed the hardest stone known to man. Many people think that statement implies a diamond can't break, but that's simply not true. In using the term "hardest" it is a reference to the hardness scale and means only that diamond is hard to scratch. The Moh's Hardness Scale is named for it's inventor, Freidrich Mohs.
Diamonds have a high dispersion factor, what I refer to as the "sparkle factor." Diamonds are most famously crystalline but can occur in what is known as fancy colors: pink and reds are very rare, yellow, brown, blue and a variety of hues and tones of all these colors.
While plentiful to a certain degree, it takes alot of work and expense to find diamond rough and a very extensive process culminates in a faceted diamond gemstone. To be an investment grade diamond, there must be the quality of rarity. For diamond that means at least one factor: fancy color, perfection, size. If not fancy color, the diamond must be pretty close to perfect and big, really big.
Photo: Custom design hand made 18 karat and 1.60 carat diamond ring by Tom Owczarzak, Jan David, Inc (Jan David Design Jewelers, All Animal Jewelry, Tosa Fine Jewelry)