The
Rarest of the Rare.
Diamonds considered so unique only one out of every one thousand natural
diamonds can be considered a fancy yellow diamond or Canary diamond.
The natural diamond color scale spans from the D colorless range all the
way down to Z color or very light yellow. Much further down the scale
before lower than Z color ones starts to reach the area of fancy yellow or
Canary diamond colors.
What is unique and rare is that only a few diamonds have a pure yellow hue
to them. Most diamonds when looking at the scale below Z color have other
less desirable colors in them such as brown or gray. But when a diamond’s
color is much lower than Z color and has a pure yellow hue it is considered
a natural Canary diamond.
Canary diamonds are freaks of nature. Colorless diamonds are made of pure
carbon bonded together by the strongest bond in nature called Ionic bonds.
Yellow diamonds derive their color from a Nitrogen impurity in the crystal
structure.
Nitrogen when present in the diamonds structure will give the diamond the
yellow tint we see when it is polished. The strength of the color depends
on the amount of Nitrogen in the diamonds structure.
The more Nitrogen the stronger the yellow color.
