CO₂ Reduction and Climate Protection at Maren Jewellery

Whenever we need inspiration, when the soul thirsts and a break is needed, then we find the answer to all these longings in nature. Because it holds something that no city has yet: a pervasive peace. And with this peace we want to be in relationship, we want to be part, but not only. After all, relationships are about give and take.

Maren Jewellery stands for luxury jewelry with the aim of giving greater consideration to ecological and social aspects along the value chain. It does not stop with the materials we use. But it begins there. That is why we craft our jewelry pieces from recycled gold, and 925 sterling silver. Instead of natural diamonds, whose origin cannot always be fully traced and whose extraction can in some cases be associated with social and environmental risks, we have chosen lab-grown diamonds. It took us a long time to establish a supply chain that meets our standards, with partners who take our goals as seriously as we do.

But of course: Whenever something is produced, waste products are created as well. We are working to ensure that all our waste products are recyclable and can therefore be easily returned to the production cycle. And we are getting ever closer to the circular economy—for example, by avoiding plastic and other non-biodegradable resources. But: This only concerns production materials. What about our CO₂ footprint?

Reducing emissions is a key part of our sustainability approach. Everything we can do is reduce our output; at present, we cannot avoid it entirely. That is why we continuously optimize our processes and work to reduce emissions along our value chain. In addition, we support certified climate protection projects. We report this support separately from our calculated GHG emissions and do not deduct it from our emissions balance.(1)

And the results speak for themselves. According to our calculations, the CO₂ values of our jewelry pieces are significantly lower than the comparison values we calculated for production using conventional materials.(1)

Through our choice of materials and manufacturing methods, our jewelry pieces generate an average of around 1.54 kg CO₂e per piece of jewelry from materials and production.(1) For comparison: according to our calculations, producing our jewelry pieces using conventional comparison materials results in an average value of around 35.45 kg CO₂e per piece of jewelry.(1) Across all jewelry variants examined, this represents an average reduction of around 87% compared to the respective calculated conventional comparison values.(1)

But at Maren Jewellery, we go one step further: For every piece of jewelry sold, we support certified climate protection projects by purchasing carbon credits amounting to 100 kg CO₂e.(2) During the reporting period 05/2025–05/2026, we purchased a total of 23.45 t CO₂e in carbon credits in this way.(2) This support is provided in addition to our emission reduction measures. We report the purchased carbon credits transparently and separately from our calculated GHG emissions

You can find the individually calculated CO₂e footprint on every product page and in our journal under Life Cycle Assessment more details about our calculation. We also publish our GHG balance annually, covering various areas of our company, in our Sustainability Report. With this approach, we create transparency about our emissions and support additional climate protection measures. And we do it together!

We continuously reduce our emissions and additionally support certified climate protection projects. We publish the details transparently in our Sustainability Report. We are proud of that. Because: We must protect what we love. We love nature. What do you love?

(1) Maren Jewellery, Sustainability Report 2025/2026 and the company’s own CO₂e calculation for its jewelry pieces. Calculation based on 128 analyzed product variants. Maren Jewellery average for materials + production: 1.54 kg CO₂e per jewelry piece. Average of the calculated conventional comparison values: 35.45 kg CO₂e per jewelry piece. Average individual percentage reductions across all analyzed product variants: around 87%. For the calculation, among other factors, 36 kg CO₂e/kg is used for recycled gold, 9.3 kg CO₂e/kg for recycled silver, and 17 kg CO₂e/ct for lab diamonds.

(2) Maren Jewellery, the company’s own evaluation of the carbon credits purchased via Chooose during the reporting period 05/2025–05/2026. Carbon credits amounting to 100 kg CO₂e are purchased for each jewelry piece sold. A total of 23.45 t CO₂e in carbon credits was accounted for during the reporting period.

(3) C.HAFNER / INEC Pforzheim University, Life Cycle Assessment for the Recycling of Precious Metals, 2022. For Maren Jewellery’s current calculation, an emission factor of 36 kg CO₂e per kg of gold is used for recycled gold.

(4) Ashby et al., 2021, Elsevier. For recycled silver, Maren Jewellery’s current calculation uses an emission factor of 9.3 kg CO₂e per kg of silver.

(5) Parnuwat Usapein; Chantra Tongcumpou, “Greenhouse Gas Emission in Jewelry Industry: A Case Study of Silver Flat Ring”, 2016. DOI: 10.35762/AER.2016.38.1.2. The study is used as the basis for calculating the casting and polishing production step. For stone setting work, Maren Jewellery uses its own operational proxy based on equipment power, working time, and the electricity emission factor.

(6) For lab diamonds, the current calculation uses an emission factor of 17 kg CO₂e per carat as a proxy. The value is based on an external Sphera model for CVD lab diamonds using renewable energy and does not represent a product-specific Product Carbon Footprint from Fenix Diamonds.