Synthetic Yellow Diamond

Button to see available yellow diamonds
AOTC primarily offers yellow diamonds from fancy light yellow to fancy vivid yellow and up to two carats.

Images of different yellow colors

Origin of the Yellow Color

Chart showing yellow tone and saturation
The tone and saturation
of color gives our diamonds
their natural beauty
and range of color.
Periodic element tile for nitrogen Being one of the forms of carbon, diamonds are made of carbon atoms, but receive their color from impurities inside the diamond. Nearly all diamonds – mined and grown alike – have some impurities, with nitrogen being the most common. Nitrogen is a natural impurity, it makes up over 75% of Earth's atmosphere. During diamond growth, a nitrogen atom replaces a carbon atom in the diamond lattice, creating a yellow 'color center'. This center absorbs all visible light except for yellow which is reflected back, giving the diamond its yellow color.

Generally speaking, the more nitrogen in a diamond, the more saturated the yellow color is. If the diamond contains too much nitrogen it shows a yellowish brown color, which is common with industrial-quality diamonds. During diamond synthesis, it is possible to capture nitrogen in substances other than the diamond lattice, limiting the yellow color centers. These substances are called 'getters' and allow better control over the resulting diamond color. By limiting the amount of nitrogen in the growth cell, and capturing the excess with getters, we are able to produce desirable gem-quality colors.

Orange Modifiers

Many lab grown diamonds are available with an orange or yellow-orange color. This color is the result a certain type of a metal solvent used for synthesis. The diamond is grown in a molten metal solution composed of various elements necessary to create proper growth conditions. The orange color comes from those elements being trapped in the diamond lattice, along with the nitrogen, creating orange or orange-yellow color centers, depending on the concentrations.

gradient showing orange modifying colors

While we still have some in-stock, we are not actively producing diamonds with an orange modifying color.

Growth Duration

Nitrogen helps to significantly accelerate diamond growth. One press cycle typically runs five to six days and will create one rough that could be cut into a one to two carat diamond.

Shape

AOTC offers most popular shapes, with the majority being princess, radiant, cushion, asscher and emerald due to overall demand and yield. Round brilliants are also being offered based on production capacities. Elongated shapes such as marquise and pear typically have low yields since the size is determined by the longest dimension of our squarish rough. For this reason, elongated shapes are not normally produced.

Type

All synthetic yellow and orange diamonds are type Ib.