Responsibility for people, the environment, and resources is a core part of how we operate. But what is the actual CO₂e footprint of a piece of jewelry from Maren Jewellery? We did the math – and compared. The result: On average, our jewelry pieces generate around 1.54 kg CO₂e through materials and production.(1) Using conventional comparison materials, the average we calculated is around 35.45 kg CO₂e.(1) Across all jewelry variants analyzed, this results in an average reduction of around 87% compared to the respective calculated conventional benchmark values.(1)
life cycle assessment of our jewelry pieces
Sustainability
Why our CO₂e footprint is comparatively low
Our comparatively low CO₂e footprint results from our choice of materials, short delivery routes, and collaboration with selected partner companies.
Lab-grown diamonds: For our synthetically produced lab-grown diamonds, we currently use 17 kg CO₂e per carat in our calculations.(2) This value is used as a proxy for the calculation. Actual emissions may vary depending on the manufacturing process and energy supply.
Recycled gold from C.Hafner: For our recycled gold, we currently use 36 kg CO₂e per kg of gold in our calculations.(3) Recycled gold therefore causes significantly lower emissions than gold from primary extraction.
Recycled silver: For our recycled silver, we currently use 9,3 kg CO₂e per kg of silver in our calculations.(4)
In addition to the materials, we also take into account emissions from the production of our jewelry pieces. This includes, among other things, casting and polishing as well as stone setting.(5) Based on our current calculation, the materials and production of our jewelry pieces result in an average of around 1.54 kg CO₂e per piece of jewelry.(1)
For comparison: According to our calculation, producing our jewelry pieces using conventional benchmark materials results in an average value of around 35.45 kg CO₂e per piece of jewelry.(1) Across all jewelry variants examined, this corresponds to an average reduction of around 87%.(1) We see great potential here for reducing emissions and hope that our approach will inspire other companies as well as our customers.
We also support certified climate protection projects
For every piece of jewelry sold, we support certified climate protection projects amounting to 100 kg CO₂e.
In addition to our measures to reduce emissions, we support certified climate protection projects. In the reporting period 05/2025–05/2026, we purchased carbon credits totaling 23,45 t CO₂e.(6) We report these separately from our calculated GHG emissions and do not deduct them from our emissions balance.
Transparency is a given for us
In our Sustainability Report, we openly present the calculated CO₂e emissions of various pieces of jewelry – with direct comparative figures from the conventional jewelry industry. Anyone who wants the full details will find all the figures, derivations, calculation methods, and sources there.(1)
Our goal: Jewelry that is not only beautiful, but also responsibly made – for you and our planet.
Sources:
(1) Maren Jewellery, Sustainability Report 2025/2026 and own CO₂e calculation of the jewelry pieces. Calculation based on 128 examined product variants. Maren Jewellery average material + manufacturing: 1.54 kg CO₂e per jewelry piece. Average of the calculated conventional comparison values: 35.45 kg CO₂e per jewelry piece. Average of the individual percentage reductions across all examined product variants: around 87%.
(2) For the lab-grown diamonds, an emissions factor of 17 kg CO₂e per carat is used as a proxy in the current calculation. The value is based on an external Sphera model for CVD lab-grown diamonds using renewable energy and does not represent a product-specific Product Carbon Footprint from Fenix Diamonds.
(3) C.HAFNER / INEC Pforzheim University, Life cycle assessment of precious metal recycling, 2022. For Maren Jewellery's current calculation, an emissions 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 uses an emissions factor of 9.3 kg CO₂e per kg of silver in the current calculation.
(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 manufacturing step. For the stone-setting work, Maren Jewellery uses its own operational proxy based on equipment power, working time, and electricity emissions factor.
(6) Maren Jewellery, own evaluation of the carbon credits purchased during the reporting period 05/2025–05/2026 based on the Chooose statements. A total of 23.45 t CO₂e in carbon credits were included for the reporting period. The credits are reported separately from the calculated GHG emissions.
Written By Helge Maren
Helge Maren, the designer behind Maren Jewellery, combines her deep passion for jewelry with impressive expertise. Her writing reflects her dedication to timeless, luxurious jewelry aesthetics and a responsible lifestyle, which distinguish Maren Jewellery.
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