About Us





three x seven Jewelry is a San Francisco-based sustainable jewelry brand sold globally online that uses materials with low environmental impact and systems that contribute to society.

At three x seven Jewelry, our mission is to make sustainable social change and tackle the social issues by delivering beautiful, high-quality and conscience jewelry pieces made with sustainable manufacturing practices and ethically sourced material to our customers at a fair price point.

It all begins with the material. We are dedicated to exclusively using materials that are eco-conscious for our entire line of products and packaging.

Creating jewelry you can feel good about wearing. This is what we promise to deliver. We believe that we can make a change that will last together.



Handcrafted in SF Bay Area Studio



Our main jewelry studio is located in San Francisco Bay Area - Most of our beautiful jewelry pieces are handcrafted here locally!

Our sourcing team is very persistent in finding the right partners - We only partner with suppliers and manufacturers who adhere to strict protocols in regards to the sourcing of both lab-created and mined gemstones.  


Corporate Responsibility

We are committed to conducting all operations in the most socially responsible manner possible

At three x seven jewelry, we are committed to ethical sourcing and environmental sustainability in all aspects of our operations.

This includes

  • Using 100% recycled metals in our manufacturing processes.
  • Using fair-trade materials to improve the lives of workers and their working environment.
  • Using no-conflict diamonds and gemstones.
  • Using recyclable, biodegradable, and ECO-certified packaging
  • Supporting activities for organizations engaged in environmental activities and solving social problems.

By supporting ethical suppliers and every facet of fair trade jewelry, we believe we can make a difference in our communities. And just as we are committed to bettering the global jewelry industry, we are committed to making our own local community a better place.



The outstanding creativity of our jewelry designs reveals the precise artistry of our craftspeople.

three x seven Jewelry is designed and fabricated in San Francisco CA and Lafayette LA, using engineering, technology and old world jewelry making techniques. We create made to order fine quality jewelry not available in mass produced, high volume jewelry manufacturing. All three x seven Jewelry is guaranteed to be made of the highest quality materials and jewelry fabrication, and is designed to last a lifetime. We offer a range of products: bridal jewelry, wedding bands, and fine jewelry.



Meet the woman behind three x seven Jewelry - Asuka Saito.

asuka jewelry designer 


Jewelry Designer
GIA Applied Jewelry Professional
CPAA Certified Pearl Specialist
Born in Sapporo/Hokkaido, Japan.

Moved to the U.S. in 2005. 

Asuka is a dreamer, a doer, and an award-winning designer who left a jewelry store in San Francisco after working for 10 years and launched her own brand, three x seven Jewelry in 2020.

Following her vision to tackle the social issues by delivering beautiful, high-quality, and conscience jewelry pieces without the typical high retail markup, Asuka started working with certified recycled metals suppliers and trusted gemstone suppliers who shared common ethical and sustainable values. She set out to reinvent an established industry by putting a focus on sustainability. 

Combined with modern and thoughtful designs, meticulous details, and a strict quality standard, three x seven Jewelry is made for all the modern people who value not only beauty but also its environmental and social impact.

 "I believe that more transparent, sustainable and inclusive jewelry is what jewelry real beautiful is, and is what jewelry you can feel good about wearing. "