The 4 C's
The four c's is the diamond industry's 4 most crucual grading criteria for determing a diamond's quality and value.
The carat is the unit of weight for diamonds. Originally the carat was the weight of the carob seed, with which ancient lapidaries balanced their scales. In this century the carat was standardized on the metric system as .2 gram. The carat is divided into 100 points. A 1.00 carat diamond is a "100 pointer," a .50 carat diamond is a "50 pointer," and a .05 carat diamond is a "5 pointer."
The color of a diamond is important. The closer it is to being absolutely colorless, the more valuable it will be. The GIA grading system assigns letters to various diamond colors. The scale begins with D (colorless) and continues to Z (very poor in color). There are also diamonds called "fancy diamonds," which are valued for their color. Diamonds can be found in many fancy colors which include blue, red and yellow. Most Kranich's diamonds fall into the colorless or near colorless range.
Most diamonds have natural characteristics within the stone and these are known as natural inclusions. They may be minute crystals of minerals, cracks, feathers, or small whiter or black spots. Inclusions affect the clarity of the diamond to the degree that they interfere with the passage of light through the diamond. An internally flawless diamond is one in which no inclusions are visible to a trained eye under 10 power magnification and normal lighting conditions. Internally flawless diamonds are most rare and the vast majority of the world's most beautiful diamonds are not flawless. Inclusions make each diamond unique, like a fingerprint.
Diamonds and other Gems are cut and shaped in several different ways to emphasize their qualities, which include color, luster, and fire. A gem cutter will pick a cut based on the special properties of a particular gem. For instance, the multiple symmetrical facets of the brilliant cut enhance the sparkle of a diamond. The most popular cuts for a diamond engagement ring are Round, Princess, Marquise, Emerald, Radiant, Pear, Oval, Heart, Asscher and Cushion Shape.
Yellow Diamonds, often called Canary Diamonds or Canary Yellow Diamonds are the most common of all the fancy colored diamonds. The reason being, white diamonds are measured for their color on a scale from D to Z. "D" being absolutely colorless and "Z" having a faint yellow hue. But this scale actually goes beyond Z to the fancy yellow diamonds. the level Z is really the dividing line between white diamonds and fancy yellow diamonds. A white diamond becomes less valuable the closer it gets to Z, but once it passes Z it becomes a fancy yellow diamond and increases in value the more intense it gets. However since the natural yellow diamond is of the same caliber as the white diamond just on the opposite side of the color scale, it is far more common than naturally pink or other color diamonds which only form in special circumstances. Because of this, naturally yellow fancy diamonds are far more affordable than any other natural fancy diamond color.