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Lab grown coloured diamonds are graded by the same 4Cs as regular diamonds: Carat, Cut, Clarity, and Colour.
The only difference is that the colour grading for fancy diamonds is not the same as colourless or white diamonds — they are measured on a scale ranging from Faint, Very Light, Light, Fancy Light and Fancy to Fancy Intense, Fancy Vivid, Fancy Dark and Fancy Deep. Lab grown coloured diamonds with colour gradings of Fancy Intense and Fancy Vivid have the most colour and are highly valued.
Just like natural fancy-coloured diamonds, the lab grown family-coloured diamonds come in twelve pure hues including blue, pink, yellow, orange, green, brown, grey, purple, violet, red, white, black.
Though they may look similar to their gem counterparts, naturally coloured diamonds are much rarer due to the number of elements that need to be present for their creation deep in the earth. Each coloured diamond is placed in a certain range of colours that determines its value.
Yellow-coloured diamonds are one of the most popular variants, forming in the presence of nitrogen. Because of their bright lustre, they are best used as centrepieces in jewellery, such as the main gem of a necklace. Yellow diamonds are often a symbol of happiness, friendship, and hope.
Blue diamonds are highly prized for their exceptional rarity and brilliant appearance. Formed in the presence of boron, diamonds with a blue hue make for an ideal choice in engagement rings or wedding rings due to their symbolic relationship with eternity, devotion, and truth.
Orange diamonds are sometimes referred to as “pumpkin diamonds” due to their rich and bright shine. They are generally considered one of the rarer types of coloured diamonds. Orange diamonds typically represent energy and zest.
Brown diamonds are among the more common types of colour diamonds, accounting for almost 15% of naturally mined diamonds. Despite their common nature, this more mellow shade of diamond has become increasingly popular in Australia becasue of its versatility in matching almost any type of skin tone, earning it the moniker of “chocolate diamond”.
Red and pink are the rarest shades of coloured diamonds available and are highly valued, especially for engagement rings. Symbolic of love and passion, naturally occuring red or pink coloured diamonds are very difficult to find and can cost up to several thousand.
Black diamonds, also known as carbonados, are naturally occurring diamonds that are prized for their otherworldly appearance. In fact, diamond research is currently undecided on how these black diamonds are formed, with some proposing that part of the material comes from outer space, giving these diamonds a mysterious and glamorous reputation.
Fancy lab grown diamonds are made under carefully monitored environments in a laboratory. Diamond scientists will place a fragment of a natural diamond within a special chamber that replicates the intense heat and pressure that create diamonds deep below the earth’s crust.
To achieve the effect of certain hues and colours in the diamond, scientists will also introduce trace elements that are required for the formation of a specific colour. For example, blue diamonds occur naturally when boron is present during the formation process. To produce a blue diamond in the lab, boron is also introduced into the creation chamber.
This formation process for coloured lab grown diamonds can take up to a few weeks to complete. Once the diamond structure is fully developed, it is then retrieved from the chamber and undergoes the same cutting, polishing, and preparation to become the beautiful stones you see in our store.