Carbon-neutral lab grown diamonds are diamonds where we’ve measured the emissions created during their production and then fully offset them through investing in renewable energy projects. This means all CO₂e released during growth, cutting, polishing, and transport is balanced to a zero carbon impact.
Our process goes deeper than standard carbon accounting, because “good enough” isn’t our standard.
This commitment ensures every gemstone delivers a genuinely climate-positive impact, not just carbon-neutrality for our gemstones.
We support internationally verified projects certified by:
Because electricity use is the largest source of emissions in gemstone production, we prioritise renewable-energy projects located in the same regions where our gemstones are grown. This ensures our offsets directly support the transition to cleaner energy in the communities that power our supply chain.
You don’t pay anything extra. Cullen covers the entire cost of making your gemstone carbon neutral.
To give you an idea of what we offset:
After your purchase, we send you an email confirming that the emissions for your gemstone have been fully offset. This includes the details of the carbon credits retired on your behalf, each with traceable serial numbers from independently verified registries such as Verra (VCS) and Gold Standard.
We measure the emissions from:
This gives us the total CO₂e per carat that we offset on your behalf.
We are proud to say yes! Every lab grown diamond, moissanite, and sapphire sold by Cullen is carbon-neutral, A1-A3 cradle-to-gate.
A carbon credit represents one tonne of CO₂ reduced or removed from the atmosphere through a verified project. By purchasing and retiring these credits, we offset the emissions associated with your gemstone.
It can be, but our approach has been thoroughly researched for over a year and designed to avoid that:
So you can trust that our offsets are verified and responsible.
Depending on the growth method:
The exact value depends on the country of production and the energy grid.
Lab grown diamonds avoid the large-scale land disruption, water use, and habitat impact associated with traditional diamond mining. Instead of being extracted from the earth, they are grown in controlled facilities using advanced technology.
At Cullen, we go a step further by ensuring the entire cradle-to-gate carbon footprint of our lab grown diamonds is measured and fully offset. That means the CO₂ impact of the materials, energy, cutting, and transport used to create the stone is balanced out, resulting in a carbon-neutral diamond.
We have a variety of suppliers all around the world. Our stones come from labs in Europe, Asia, and America, from countries like the US, Canada, Belgium, India, and Germany. Regardless of the location of the lab, all of our lab grown diamonds are independently graded and certified by either the GIA or IGI and are carbon neutral.
Yes, lab grown diamonds are chemically, physically, and optically identical to mined diamonds. They have the same crystal structure, hardness, and visual characteristics. The only difference is their origin - lab grown diamonds are created in controlled laboratory environments, while mined diamonds are formed naturally in the earth. Both types of diamonds receive the same certification and grading from established gemmological institutes.