Our Story
Built on Four Decades of Manufacturing Excellence
Amanda Jewellery was founded in Bangkok in 2005 by the team behind K.S. Jewelry International. Every partnership we take on carries that weight of experience.
Book a ConsultationFounded 1989
Founded in 1989. Re-registered in 2005.
A Manufacturing House Built for Brands Where Every Detail Matters
Our mission is to craft the finest jewellery we can, while safeguarding people and the environment.
Amanda Jewellery was first founded in Bangkok in 1989 and later re-registered in 2005. Its development has been shaped by Klaus Stenzhorn, founder of K.S. Jewelry International, together with his long-standing business partner Chadaporn Piyasiranon.
Amanda's story is closely connected to the wider K.S. Jewelry heritage, which goes back to 1979, when Klaus Stenzhorn and his brothers began their jewellery manufacturing business in Bangkok. That foundation gives Amanda a depth of experience that reaches beyond any single company registration date.
From the outset, Amanda was built to serve fine and high jewellery brands that require more than production: technical judgement, confidentiality, consistency and a manufacturing partner able to work as an extension of their creative and commercial team.
What began as a precision silver jewellery atelier evolved, by deliberate design, into a full-capability gold and platinum manufacturing house. Today, Amanda combines its own workshop expertise with controlled group capabilities through K.S. Jewelry International, spanning CNC machining, microscope setting, traditional goldsmithing, precision stone cutting and a dedicated pre-loved diamond department. This gives the brands Amanda works with the benefit of integrated expertise, while preserving consistency, confidentiality and control across development and production.
When you work with Amanda, you are working with an operation built over decades to support long-term manufacturing relationships with care, discipline and technical depth.
The People Behind the Work
Managing Director & Founder — Chadaporn Piyasiranon
The Leadership Behind the Operation
Chadaporn Piyasiranon has been Klaus Stenzhorn's business partner for over 30 years. As CEO of Amanda Jewellery, she leads the company's people, daily operations, legal matters, and compliance — the internal structure that enables the atelier to operate with consistency and care.
Her leadership has been central to Amanda's growth as both a manufacturer and an organisation. Under her direction, Amanda has developed a culture in which responsibility, opportunity and female leadership are not treated as separate initiatives, but as part of how the company works every day.
"By embracing the Women's Empowerment Principles and cultivating an inclusive workplace, we are demonstrating that women can thrive in high-end jewellery manufacturing. Our female managers are reshaping a traditionally male-dominated industry into one that champions equity and innovation."
Chairman & Founder — Klaus Stenzhorn
Since 1979, One Standard.
Klaus Stenzhorn's jewellery manufacturing story began in Bangkok in 1979, when he and his brothers started what would become K.S. Jewelry International. His career has followed the evolution of modern fine jewellery manufacturing — from the traditions of goldsmithing to the precision engineering and technical innovation that define today's highest-level production.
As Chairman of Amanda Jewellery, Klaus brings decades of industry experience, technical ambition and an uncompromising instinct for quality. His standards continue to shape the way Amanda approaches craftsmanship, problem-solving and continuous improvement.
"Never stop improving — the road to success is always under construction."
Our Philosophy
Excellence Is Never a Finished Goal
Amanda operates by the Kaizen principle of continuous improvement. Every day, our team refines its craftsmanship, improves its processes and learns from new technology, new materials and new design challenges.
Small, consistent improvements compound into something that matters: jewellery made with greater precision, fewer compromises and deeper understanding over time. This culture, built by Klaus Stenzhorn across decades of manufacturing, is what makes Amanda a long-term partner rather than a transactional supplier.
Continuous Improvement
Every process, every piece, every year — refined.
Responsible Production
Sustainable practices embedded at every stage, from sourcing to delivery.
Technical Ambition
The willingness to invest in capability so that no brief is out of reach.
Our Mission
To Craft Jewellery With Skill, Responsibility and Care
Our mission is to help brands create fine and high jewellery that honours their design intention, protects their reputation and meets the standards their clients expect.
We combine modern technology with traditional goldsmithing, setting and hand-finishing, while working responsibly toward better sourcing, safer materials, respect for people and reduced environmental impact. For us, exceptional jewellery is not only about how a piece looks. It is also about how it is made, who makes it and what standards stand behind it.
More From Amanda
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We build long-term manufacturing partnerships with brands that value precision, confidentiality, and responsible production.
Based in Bangkok, Thailand. Serving brands globally.