What is a Carbon Negative Diamond?

A Diamond bearing the USPTO registered C- (C Minus®) trademark is grown in a lab using renewable energy, like solar power. Every C-® Diamond grown sequesters more carbon in the diamond than is released into the atmosphere.

How much does a C-® Diamond cost?

C-® Diamonds cost the same as other lab-grown diamonds.

What is Carbon Sequestration?

Carbon sequestration is the capture and secure storage of carbon that would otherwise be emitted to or remain in the atmosphere.

How does producing Carbon Negative Diamonds help reverse climate change and global warming?

Carbon Negative Diamonds are produced by converting carbon from methane gas into solid diamonds. Carbon in diamonds does not contribute to global warming or climate change. Carbon in solid form is good.

How can I tell if my diamond is Carbon Negative?

You can tell that your diamond is Carbon Negative because it has the USPTO registered C Minus® trademark on the girdle.

We require all authorized C Minus® Diamond Manufacturers to certify that 100% of the energy used to grow each C Minus® Carbon Negative diamond comes from renewable sources, like solar power, so that no carbon is emitted during the growth of the diamond.

Where can I buy a C Minus® Carbon Negative Diamond?

We will add a list of retailers once the product is available in stores. Here is a link to our online concept store

How can I apply for permission to use the C Minus® mark on the Carbon Negative Diamonds I produce?

Apply for a license to apply the C Minus® mark here: Apply for A License

I’m a Diamond Jewelry Retailer. How can I carry the C Minus® Diamond Brand?

Fill out our Retail Application and we’ll send you information about our 30 day risk free test memo.