Pandora is adding carbon footprint labelling to its lab-grown diamonds to increase transparency and allow consumers to compare the climate impact of its jewellery pieces.

The retailer said the information will sit alongside the traditional four grading criteria – cut, colour, clarity and carat – on its website.

Pandora stopped using mined diamonds in 2021 and switched to lab-grown diamonds made with 100% renewable energy and recycled silver or gold.

The brand noted that the carbon footprint of one carat of its lab-grown diamond had 12.58kg on CO2 emissions, 90% lower than a mined diamond of the same size.

Pandora chief executive Berta de Pablos-Barbier said: “We believe the future is about making diamonds more accessible while giving customers clarity on what they’re buying.

“We craft our jewellery with sustainability in mind, and by introducing the 5th C, we’re empowering consumers to make informed choices.

“As consumers demand greater knowledge of how their products are made, transparency is becoming a defining force for brands. We are happy to share our learnings with others,” Pablos-Barbier added.