INSIGHTS: Understanding man-made diamonds with Pure Grown Diamonds

Lab grown or man-made diamonds are becoming ever-more significant in the global jewellery marketplace, with companies such as Pure Grown Diamonds branding and marketing their stones to eco-conscious customers.

Grown under sustainable conditions, the ‘Pure Grown’ process results in 1.5 billion times less air pollution than traditional mining practices. The ratio of carbon, nitrogen and sulfur emissions when comparing mined-diamonds to lab-grown diamonds is 1.5 billion to one, according to the company.

Pure Grown attracts its consumers through a promise that grown diamonds do not undermine the sustainability of natural systems or the environment, “allowing future generations to have the natural resources they will need”.

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The Pure Grown Process

Pure Grown Diamonds has spent 70 years perfecting the diamond growing process, which replicates the earth’s natural processes. The process starts in the company’s ‘Diamond Growing Greenhouse’ in Singapore with a small piece of carbon known as a ‘diamond seed’.

This is placed in a low pressure microwave chamber before hydrogen and methane gases are introduced.

Energy is then pumped into the chamber igniting a ‘plasma ball’ before carbon molecules rain on the diamond seed and crystallization begins.

It takes 10 to 12 weeks for Pure Grown Diamonds to mature. They are then cut with a laser, polished, certified and inscribed with the phrase ‘lab grown’ and a diamond number.

Pure Grown Diamonds is the world’s largest distributor of gem-quality grown diamonds, including white and fancy coloured stones.



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