Luxury OEM Jewellery Manufacturing
The Manufacturing Partner Behind Fine and High Jewellery Brands
Since 2005, Amanda Jewellery has helped brands transform creative vision into precision-made collections, crafted in gold, platinum, diamonds, and precious stones. Based in Bangkok. Delivered to the highest standard.
Our Partners
Built for the Standard Your Brand Promises
Amanda works with jewellery brands at different stages of growth, from emerging designers developing their first fine collection to established houses expanding important lines.
What we offer is something rarer: a manufacturing partnership in which your creative ambition meets our engineering depth. Working as an extension of your team, we bring material expertise, technical problem-solving and production intelligence to every stage of development.
Our role is to help you avoid unnecessary compromises, resolve manufacturing challenges early and bring stronger, more consistent jewellery to market — with discretion, precision and respect for your brand's identity.
The Challenge
The Gap Between Vision and Excellence Is Manufacturing
Many factories can produce a design. Fewer can help protect the intention behind it. At Amanda, we engage early — refining structure, stone fit, wearability and production logic before small issues become costly problems. The goal is to help your design become a beautiful, reliable and repeatable piece of fine jewellery.
Bangkok is not simply where we manufacture. It is one of the world's rare jewellery ecosystems — a place where goldsmithing, stone cutting, gem trading, engineering and hand-finishing expertise exist side by side. For the brands we serve, that concentration of skill is a strategic advantage.
Why Amanda
Why Discerning Jewellery Brands Choose Amanda
Amanda supports brands that need more than production: technical judgement, confidentiality, material integrity and the discipline to make exceptional jewellery repeatable.
Complete In-House Production
Every critical stage of production — from CAD development and stone preparation to setting, finishing and final quality control — is managed in-house or through our controlled group infrastructure. This gives your brand greater consistency, confidentiality and control where it matters most.
Craftsmanship Meets Precision Technology
We combine centuries-refined goldsmithing tradition with the capabilities of modern manufacturing: CNC machining, microscope setting, advanced stone cutting, and structural engineering. The result is jewellery that performs at the highest level, technically and aesthetically.
Responsible Sourcing and Traceability
We offer Single Mine Origin (SMO) gold, work with Kimberley Process compliant diamonds and source through vetted suppliers. The integrity of your supply chain begins with the standards we apply to ours.
A Partnership, Not a Transaction
We do more than manufacture what is on the order. We help you realise collections. That means asking the right questions early, identifying technical constraints before they become costly, and bringing our production knowledge to bear on making your vision reliable in production.
Confidential by Design
We work as an invisible manufacturing partner. Client designs, technical files and finished pieces are protected by strict confidentiality agreements, with no portfolio use without consent.
SUSTAINABLE JEWELLERY MANUFACTURING
Amanda is a signatory to the UN Global Compact, an RJC member, a WEPs signatory and a participant in the Watch & Jewellery Initiative 2030. Responsible sourcing, environmental stewardship and social accountability are embedded in how we operate — not added on top of it.
View our ESG commitments →What Sets Us Apart
Proof, Not Promises
By keeping key processes in-house, Amanda Jewellery gives brands greater control over quality, confidentiality, development speed, and final execution.
In-House Diamond & Gemstone Cutting
Diamonds sourced from auction and estate lots, cut in-house to specification — a sustainable alternative to newly mined stones for clients who require it.
Microscope-Assisted Setting and Goldsmithing
Pavé, invisible and channel settings are executed under microscopes for precision beyond what the naked eye can judge. Fine details are protected through careful hand-finishing, avoiding the loss of definition that can come from overfiling.
CAD & Engineering Support
Design refinement and technical problem-solving before a gram of metal is committed
CNC Machining
Consistent, repeatable precision for complex geometries across full production runs
Full Process Control
From CAD to quality control, every critical stage is managed internally or through our controlled group infrastructure.
Confidential Development
NDA-backed partnerships — your designs, your IP and your technical files are never shared without consent.
Our Products
From Concept to Collection
We manufacture across the full spectrum of fine jewellery, including rings, bracelets, earrings, necklaces and bespoke pieces, in gold, platinum, natural diamonds and precious stones. Every piece is developed to carry your brand's identity with precision, durability and refinement.
Explore Our Products →
Our Process
Production That Leaves Nothing to Chance
Our process begins with the questions that protect your design. What is the structural challenge? What does the material require? How can the setting be refined without compromising the beauty of the piece? From concept refinement and technical engineering through stone selection, production and quality control, we apply rigour at every stage. Nothing reaches your hands until it has been examined, refined and approved.
See Our Full Process →20+
Years of manufacturing excellence
Bangkok
Full in-house production facility
SMO & KP
Certified ethical sourcing
"Never stop improving — the road to success is always under construction."
Klaus Stenzhorn, Chairman & Founder
Our Founders
The People Behind Amanda
Amanda Jewellery was established in its current form in 2005 by Klaus Stenzhorn, founder of K.S. Jewelry International, together with his long-trusted business partner Chadaporn Piyasiranon. Their shared experience shaped Amanda into a manufacturing house where technical excellence, responsible practice and respect for people are part of the same standard.
Chadaporn leads Amanda's daily operations with the calm authority of someone who has spent decades building the company from within. Klaus brings long industry experience, technical ambition and the constant drive to improve that continues to define Amanda's work.
Their partnership, spanning more than thirty years, remains one of the foundations on which the company stands.
Sustainability
Manufacturing With a Conscience
Sustainability at Amanda is not treated as a separate policy layer. It is built into how we source materials, manage production, care for our people and measure improvement over time. We work responsibly, document our commitments and operate a workplace where women hold key leadership roles.
For the brands we partner with, this creates more than reassurance. It supports responsible supply chains, protects brand trust and reflects values that increasingly matter to the clients who wear the jewellery.
Begin a Partnership
Ready to Build Something Exceptional?
We build long-term manufacturing partnerships with brands that value precision, confidentiality, and responsible production.
Based in Bangkok, Thailand. Serving brands globally.