About Us





"...We provide jewelry that brings smiles to the faces of everyone involved."


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 contribute to the realization of a shining future by providing jewelry that brings smiles to all those who are involved.

Our vision is to provide truly beautiful jewelry that feels good to wear.

1. We provide emotional value through jewelry that connects the originally invisible "feelings" and the "meaning" of jewelry, and continues to be close to the owner as a tangible object.

We not only make jewelry shine, but also connect our customers' feelings and the meaning of jewelry, and help make their life stories shine through jewelry.


2. We aim for harmonious development with society by addressing social issues with jewelry that considers not only beauty, but also "people, society, and the environment."
By paying attention to various materials and people involved in the production process, such as the "environment" necessary for making jewelry, the "people" making it, and the "working environment" of those who mine it, we can have a positive impact on the environment and society.


Handcrafted in San Francisco Studio


Our main jewelry studio is located in San Francisco - 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

1. Using 100% recycled metals in our manufacturing processes.

2. Sourcing Fairmined certified gold from responsible artisanal and small-scale mining organizations. 

3. Using fair-trade materials to improve the lives of workers and their working environment.

4. Using no-conflict diamonds and gemstones.

5. Using recyclable, biodegradable, and ECO-certified packaging

6. Offering well-made and well-designed pieces at a fair price.

7. 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.



CEO of three x seven Jewelry
Award-Winning Designer

Born in Sapporo, Hokkaido, Japan, Asuka was exposed to the world of creativity at a young age. Her passion for bringing big joy through small but meaningful art, unique jewelry designs led her to pursue qualifications as a jewelry professional from the Gemological Institute of America to understand gemstones, where she honed her knowledge skills and developed a keen eye for detail.

Asuka started her career as a designer and also salesperson at a well-established jewelry company in San Francisco, where she gained valuable experience and knowledge in the field.

Since then, Asuka's work has been featured in numerous publications and exhibitions all over the world including the US, Europe, India, China, and Japan, and she has won several prestigious awards for her designs in International Design Awards held in the US, Italy, and Japan.

Following her vision to aim for harmonious development with society by addressing social issues with jewelry that considers not only beauty, but also "people, society, and the environment," Asuka started working with certified recycled metals suppliers and trusted gemstone suppliers who shared common ethical and sustainable values and launched her original jewelry brand.

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.

Asuka continues to pour her passion into jewelry design with the hope that her brand will contribute to a better future for all.