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Siku pronounced SEE-ku is more than just a jewelry line.  Siku means "sea ice". Without sacrificing design, we bring sustainable accessories to the forefront of the fashion industry and strengthen the relationship between art and science. We chose this name to emphasize the importance of ice in the environment in light of the depreciating amount due to climate change. 


We here at Siku uphold ourselves to the highest standards in design and production. All of our pieces are made from refined and recycled metals. We use 925 sterling silver (92.5% sterling silver, and 7.5% other alloys). Our vermeil is 2.5 microns of 14K yellow gold.


Our diamonds are lab grown and our stones are ethically sourced. Lab grown diamonds are a more sustainable and responsible alternative to natural diamonds, hence why we use them. Lab grown diamonds are created from real diamond cultures through HPHT (high-pressure high-temperature) or CVD (chemical vapor deposition). We use high clarity diamonds in our pieces. Lab grown diamonds and mined diamonds look the same to the naked eye.


We take great care in the design of our jewelry. Each piece is well thought out with dimension, weight, materials, and durability carefully considered throughout the design process. We create our pieces with patrimony in mind so they can be cherished and passed down through generations. 

The Hexagon

An integral part of the Siku brand identity parallels the hexagonal shape formed on a molecular level through the bonding of oxygen and hydrogen to form ice. This geometric shape is used in different ways in Siku designs, packaging, and logo. We wanted something in our designs that binds humans with the earth of which they come from, to help rebuild this connection.


We partner with manufacturers who are part of the Responsible Jeweler's Council. The RJC Code of Practices is the only industry standard covering the entire jewelry and watch supply chain. The RJC Code of Practices defines the ethical, human rights, social, and environmental practices that all certified members must adhere to.


Siku is a philanthropic brand donating profits to the prevention and reversal of climate change as well as donating to non-profit organizations that are offering solutions for our most threatening global concerns. We are a member of 1% for the Planet. Currently, only 3% of philanthropic giving goes to the environment. The 1% for the Planet® membership model drives critical philanthropic support to address the most urgent environmental issues of our time. 


Our product boxes are made from 74% recycled content (65% post-consumer and 9% post-industrial), and are recyclable. All business, and insert cards are made from 100% recyclable and biodegradable paper that’s FSC certified and produced using wind power. The mailers that we ship our products in are made from 100% recycled plastic waste, are reusable, and recyclable. To offset carbon emissions our packaging partner plants trees in areas in need of reforestation.


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