About Us

Diyonco was founded in 2016 as a testament to our commitment to diversification and growth. Our journey began in 2009 when our owner and director, Janaka Ambagahawatta, established GTel International, a telecommunication company catering primarily to the IT industry. Over the years, under his visionary leadership, we expanded our horizons, entering the supply chain, shipping, and gemstone sectors. This diversification led to the creation of Diyonco, symbolizing our broadened portfolio and dedication to innovation.

Our Mission

Shaping Brilliance Responsibly

At Diyon & CO., our mission is to provide globally conscious customers with access to ethically sourced, fine gemstone jewelry that tells a story of sustainability and exquisite craftsmanship. We strive to be more than a brand; we aim to be a beacon of responsible luxury, empowering individuals to make meaningful choices for the planet and their personal style.

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Hi! I’m Janaka Ambagawatta, CEO of Diyonco.


Janaka Ambagahawatta began his entrepreneurial journey in 2009 with GTel International. His strategic vision and leadership have been pivotal in diversifying the business, leading to the establishment of Diyonco in 2015. His commitment to innovation and excellence continues to drive our success across various industries.

Our Story

Crafting a Legacy of Brilliance

Our story begins with a vision to redefine the gemstone industry. Founded in 2016 in the vibrant city of Colombo, Diyon & CO. emerged as a response to the call for ethically-sourced, exceptional gemstones. Over the years, our commitment to sustainability, precision craftsmanship, and the allure of responsibly-sourced gemstones has shaped our legacy. Join us in celebrating the brilliance of our journey.

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Customers love us

Here, we share the sentiments of individuals who have discovered the allure of our ethically-sourced gemstones. These heartfelt reviews are a testament to the craftsmanship, quality, and personalized service that define the Diyon & CO. experience.

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“Discovering Diyon & CO. has been a game-changer for me. The Ceylon Sapphire ring I purchased is a true work of art. The team’s dedication to ethical sourcing and craftsmanship is evident in every detail. I’m proud to be a part of the Diyon & CO. family!”
Alexa Johnson
San Diego, US
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“As a collector, finding a gemstone business that aligns with my values was crucial. Diyon & CO. not only met but exceeded my expectations. The Madagascar Mystique earrings are a testament to the exceptional quality and unique designs they offer.
Karen Schwartz
Munich, Berlin
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“Janaka and the team at Diyon & CO. made my gemstone purchase an unforgettable experience. The personal touch and commitment to sustainability stood out. The Gemstone Necklace I bought is a conversation starter.
Julius Maas
Istanbul, Turkey
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