loose diamond are the hardest of all gemstones; it is the simplest in composition; they are ordinary carbon. Colossal heat and pressure, over the eons, crystallized the jewelry into what they are today.
The skill and accuracy of the ideal cut cutter is crucial in bringing out the beauty and "fire" from the stones.
Pink and blue diamond stud earrings are especially popular and have been sold at higher dollars per carat than any other loose gemstones in history. Red, green, and purple jewelry are among the rarest of the rare.