Manufacturing from client designs
Bring drawings, sketches, CAD or a reference sample. We review construction, materials and setting requirements, then agree a development and production plan.
Expertise
Manufacturing from your designs, with the depth to support every stage.
ACCA works with premium jewellery brands, independent designers and chain stores. Our focus is translating client designs into fine jewellery that meets agreed specifications.
30 yearsManufacturing experience
7,000+ m²Factory space
10,000+Pieces per month
14–45 daysProject-dependent delivery
Manufacturing from client designs
Start with what you have. We take it to production.
Most projects begin with a design that already exists: drawings, sketches, CAD files or a reference sample. We review how it will be built, then agree a development and production plan before anything is made.
Where a concept needs more resolution, our 2D design team and 3D CAD development turn it into drawings, models and specifications you can approve. Where the design is finished, we engineer it, sample it and produce it to specification.
Throughout, the design stays yours. Confidentiality and respect for client intellectual property are central to how we work, and your designs are used only for your project.
What we review with you
- ConstructionHow each part is formed, joined and finished.
- DimensionsSizes and wall thickness that decide strength and comfort.
- MaterialsMetal, colour and finish, confirmed in the technical specification.
- Stone settingsThe setting and stone layout that balance light, security and design.
- Production requirementsProcesses, quantity and timing for production.
At a glance
Six capabilities, coordinated in-house.
Design development
Our 2D design team helps resolve concepts into detailed drawings and specifications when you need additional support.
Technical development
3D CAD modelling and rendering in Rhino and Matrix, followed by 3D wax printing for physical review.
Fine materials
Karat gold, platinum and silver, with a focus on fine jewellery and premium gold work.
Specialist processes
Casting, filing, setting, polishing and plating, coordinated in-house.
Collaborative scope
Responsibilities vary by project. You decide where to involve us — from research support to production only.
Who we work with
Three kinds of client. One collaborative way of working.
Whether you lead a brand, design independently or run a multi-location programme, the starting point is the same: your design and your specification.
Our Hong Kong office and manufacturing facility in China serve clients internationally, with a focus on the United States and Europe.
Jewellery brands
Collection development and production for established and growing premium brands.
- Research support and concept development when you want us involved earlier
- Engineering, sampling and production to your specification
- Confidentiality and respect for your intellectual property
Independent designers
Technical development and manufacturing that respects your design language.
- 2D design development to resolve a concept into detailed drawings
- CAD, rendering and 3D wax, so you see the piece before metal is cast
- Samples reviewed and approved before production begins
Chain stores
Consistent production for multi-location programmes.
- Monthly capacity of more than 10,000 pieces
- Quantities agreed per project, from development samples to consistent programmes
- Approved designs archived as CAD, ready to re-order or adapt, where agreed
What we make
Four categories, engineered piece by piece.
Rings, earrings, necklaces and pendants, bracelets and bangles, in karat gold, platinum and silver. Each category has its own constructions, settings and finishing, and each project is developed through agreed approval checkpoints.
01
Rings
Solitaires, eternity bands, statement and everyday rings.
Typical constructions
- Solitaire heads: prong, cathedral, bezel, half-bezel and tension-style
- Bands: channel, flush, shared-prong and pavé
- Halo and cluster designs
- Shanks shaped for everyday comfort
Techniques & settings
- Ring size, wall thickness and shank width set in CAD
- Prong gauge and seat depth engineered to the stone
- Hand stone setting under magnification
- Hand polishing, rhodium and selective two-tone plating
- Laser engraving of logos and hallmarks
Typical for Solitaires, engagement rings, eternity and wedding bands, men’s rings and cocktail rings.
Discuss this category
02
Earrings
Delicate settings, matched stones and secure fittings.
Typical constructions
- Cluster motifs built from several stones
- Pavé and micro-pavé surfaces for delicate pieces
- Open, lace-like ornament in filigree or plique-à-jour
- Back fittings: push back, screw back, lever-back and omega back
Techniques & settings
- Stone calibration: size and colour matching before setting
- Micro-pavé setting under magnification
- Laser welding close to stone seats, with minimal heat spread
- Satin, brushed or textured finishes alongside high polish
- Enamelling for fired, brand-matched colour
Typical for Cluster and statement earrings, and delicate fine-detail pieces.
Discuss this category
03
Necklaces & pendants
Chains, clasps and centrepieces, built to hang and close well.
Typical constructions
- Soldered-link chains in cable, curb and rope, cut to custom lengths
- Pendants with halo or centre-stone settings
- Clasps: lobster, box clasp with safety, toggle and bayonet
- Hand-knotted pearl strands on silk or nylon
Techniques & settings
- Chain making, link by link
- Clasp and hinge making, fitted to fine tolerances
- Pearl knotting and restringing
- Chasing and repoussé for relief plaques and lockets
- Plique-à-jour and enamelling for translucent colour
Typical for Chains, pendants, lockets and pearl strands.
Discuss this category
04
Bracelets & bangles
Line bracelets, cuffs and bangles with secure closures.
Typical constructions
- Line and tennis bracelets in bar or shared-prong settings
- Hand-forged and saddle-curved cuffs and bangles
- Chain-style bracelets, built link by link
- Box clasps with safety catches, hinges and joints
Techniques & settings
- Hand forging for dense, work-hardened metal
- Anticlastic raising for stiff, light, sculptural forms
- Clasp and hinge making, with safety locks
- Torch soldering and laser welding for invisible joins
- Satin, sandblast and hammered surface finishes
Typical for Tennis and line bracelets, cuffs and bangles.
Discuss this categoryEvery setting, technique and finish is shown in detail on our Technology & Quality and Craftsmanship pages.
See the standard of finish in our Petite Luxe and Topaz collections.
Collections
Our commitment
Detail-oriented. Discreet. Collaborative.
01
Detail-oriented
Technical review, sample approval, production readiness and final inspection: each step is reviewed against what came before it.
02
Discreet
Your designs are used only for your project. Files are stored privately, and confidentiality requirements are agreed at the start of each project.
03
Collaborative
You decide where to involve us, from research support to production only. Scope, responsibilities and approvals are agreed together.
Services in depth
Seven services. What you bring, what we do, what you receive.
Use one, several or all of them. Every service connects to the development journey, and each ends with something you can review and approve.
2D design team
Design development
Concepts resolved into proportioned drawings, with materials, stones and construction defined.
You bring
- A concept, sketches or reference images
- The materials and stones you have in mind
- Your target quantity and timing
We do
- Resolve the concept into detailed, proportioned drawings
- Define materials, stones and construction
- Prepare specifications for your review
You receive
- Detailed drawings and specifications
- An agreed design brief, ready for technical development
CAD in Rhino & Matrix
Technical development
Client concepts are modelled and rendered in 3D to resolve proportions, construction and specifications before any metal is cast.
You bring
- Approved drawings or existing CAD files
- The target size standard and any fit requirements
- Your stone list or setting preferences
We do
- Model the piece in Rhino and Matrix
- Define geometry, stone layout, wall thickness and construction
- Render it photorealistically, so you can review it in metal and stone
- Review dimensions, settings and production requirements
You receive
- Technical specifications and CAD for review
- Rendered views of the design
- A technical sheet covering views, materials, stones, finish and approvals
3D wax and reference samples
Prototyping
Approved CAD is printed as a wax model, bridging digital design and the physical sample.
You bring
- Your sign-off on the engineering review
- Feedback on appearance, fit and finish
We do
- Print a high-resolution 3D wax master
- Cast it in the agreed metal, then file, set and polish it into a reference sample
- Refine the sample against your comments
You receive
- A physical sample for review
- An approved reference sample or a documented refinement brief
Casting, filing and setting
Production
Casting, filing, stone setting, polishing and plating are carried out in our own facility.
You bring
- An approved sample and production requirements
- Your target quantity and delivery timing
We do
- Tree, invest and lost-wax cast wax masters in the agreed metal
- Clean, file and join parts, with laser welding where needed
- Set stones by hand under magnification
- Hand polish and plate to specification
You receive
- Jewellery produced to the agreed specification
- Capacity of more than 10,000 pieces per month
- Project-dependent delivery, typically 14–45 days
Surface, colour and detail
Finishing & specialist techniques
The techniques that turn a precise model into finished fine jewellery. Thirty-nine of them are demonstrated on our Technology page.
You bring
- A finish brief: mirror, satin, textured or two-tone
- Logos, hallmarks or engraving details
- Plating or colour requirements
We do
- Finish by hand, from mirror polish to satin and textured surfaces
- Plate with rhodium, including selective two-tone effects, or apply a PVD colour coating
- Engrave logos, hallmarks and serials by laser or by hand
- Add specialist detail such as enamel, filigree or milgrain where the design calls for it
You receive
- Surfaces and colours matched to the agreed specification
- Marks, logos and hallmarks that are crisp and correctly placed
Inspection against your criteria
Quality control
Each piece is checked against the agreed specification before release.
You bring
- Your acceptance criteria
- Any requirements of your destination market
We do
- Clean ultrasonically, steam and inspect under magnification
- Check prong security, stone seating, joins, polish, edges, plating coverage, stamping and dimensions
- Measure key dimensions against the specification
You receive
- An inspection outcome and release decision
- Pieces checked against criteria agreed with you
Coordinated as agreed
Release & delivery
Quantity, documents, packaging and shipment are confirmed with you at release.
You bring
- Your destination and timing
- Any documents or packaging requirements
We do
- Confirm quantity, documents, packaging and shipment with you
- Coordinate delivery as agreed
You receive
- An agreed release and delivery confirmation
- Project-dependent delivery, typically 14–45 days once the sample and production requirements are approved
Which services you use, and how far we take each one, is agreed per project.
Materials & stones
Metals, finishes and stones, specified before production.
Our focus is fine jewellery and premium gold work. Material and stone requirements are agreed per project and confirmed in the technical specification before production.
Metals
The karat is agreed in your specification. Hallmarking requirements vary by market and are confirmed for each destination.
Metal purity & hallmarksFinishes & plating
The final surface is a design decision.
From a mirror polish to a hand-hammered facet, the finish is agreed with the design, matched to the specification and checked at final inspection.
High polishA mirror-bright surface that reflects light cleanly.
SatinA soft, low-lustre sheen.
BrushedFine directional lines for a contemporary look.
SandblastAn even matte texture with a velvety feel.
HammeredHand-hammered facets that catch the light.
FlorentineCross-hatched engraving with a classic, textile feel.
IceA frosted texture that glitters as it moves.
Diamond-cutFaceted cuts that flash like gemstones.
Two-tone rhodiumSelective rhodium for contrasting white and yellow.
Plating & colour
- Rhodium plating
- Selective two-tone plating
- Gold and colour plating
- PVD colour coating
- Anti-tarnish coating for silver
- Oxidised silver patina
- Enamel colour
Availability and scope are confirmed in the brief.
Stones
Agreed per specification.
Stone requirements are confirmed in the technical specification before production. We help choose and engineer the right setting for each piece.
- 01Cuts
- Brilliant, step and mixed cuts — twelve in our cut library — set to your specification.
- 02Settings
- Sixteen stone settings, from prong and bezel to pavé and invisible, each balancing light, security and design.
- 03Calibration
- Stones are measured, sorted and matched for size and colour before setting, so layouts sit evenly and consistently.
- 04The stone list
- Position, cut, size, quantity and setting are recorded in the technical sheet before production.
- Round
- Princess
- Oval
- Pear
- Marquise
- Emerald
Six of the twelve cuts in our library
Stone listExample layout · illustrative values
| Position | Cut | Size | Qty | Setting |
|---|---|---|---|---|
| Centre | Round brilliant | 6.5 mm | 1 | 4-prong |
| Shoulders | Round brilliant | 1.3 mm | 6 | Pavé |
Ways to work together
Four ways in. One connected journey.
Our 24-stage development journey is a framework, not a requirement. You choose where ACCA joins; scope, responsibilities and approvals are agreed together from that point.
01
Research support
Joins at stage 01 Cultural change
Explore market, customer, material and technology questions before committing to a direction.
- Market, competitor, customer and historical research, with tools agreed together
- Material and technology research, with our manufacturing perspective
- Strategy, commercial direction and launch stay with you
02
Concept development
Joins at stage 15 Concept
Develop and validate a concept into a resolved design with technical input from our team.
- Concepts developed into propositions ready for review
- Desirability, brand fit and feasibility reviewed, with technical input from ACCA
- A resolved design, ready for engineering
03
Design to manufacture
Joins at stage 17 Design
Bring finished drawings or CAD. We engineer, sample and produce to your specification.
- Engineering review of construction, dimensions and stone settings
- A prototype sample for your approval
- Production and quality control against agreed criteria
04
Production only
Joins at stage 20 Manufacturing
You hold an approved sample and specification. We confirm production readiness, then manufacture and inspect to your requirements.
- Design revision, processes and timing confirmed before production
- Manufacturing through the required specialist processes
- Quality review and release against agreed criteria
Where each route joins the 24 stages
Research supportJoins at stage 01 · Cultural change
Concept developmentJoins at stage 15 · Concept
Design to manufactureJoins at stage 17 · Design
Production onlyJoins at stage 20 · Manufacturing
- Where you join
- Scope agreed together from there
- Engineering to quality control, carried out by ACCA
Stage responsibilities are a proposed collaboration framework and are agreed for each project.
Whichever way you join, projects move through agreed checkpoints.
- Brief alignmentDesign intent, materials, scope, confidentiality
- Engineering reviewCAD geometry, dimensions, construction, stone settings
- Sample approvalAppearance, fit, finish, agreed revisions
- Production readinessDesign revision, processes, timing
- Quality reviewDimensions, setting, surface finish, applicable tests
- Release & deliveryQuantity, documents, packaging, shipment
Checkpoints and acceptance criteria are agreed for each project.
24 connected stages. A flexible collaboration.
Explore our processGo deeper
Every capability, shown in detail.
39
specialist techniques
Each one demonstrated in 3D.
Technology & Quality
16
stone settings
Compared for light, security and best use.
Technology & Quality
12
stone cuts
Plus metals, finishes, clasps and inspection points.
Craftsmanship
22
technologies
Digital, production, finishing, verification and traceability.
Innovation
24
connected stages
From cultural change to the next generation.
Our Process
What to send us
Send what you have. We will help with the rest.
A clear brief lets us advise on the right approach. None of it has to be complete: share what you have and tell us where your project stands.
0 of 9 ready
Discretion comes first.
Files sent through the enquiry form are stored privately, are not publicly accessible and are used only to evaluate your project. If you would like a mutual confidentiality agreement before sharing designs, tell us in your enquiry and we will arrange it before files are exchanged.
- Accepted files
- PDF, image, ZIP, 3DM, STL or OBJ — up to 20 MB. Stored privately.
Questions
Straight answers, before you ask.
Common questions about working with ACCA. If yours is not here, we would be glad to talk it through.
Still have a question?
Talk to our team01 What can I send you to get started?
Drawings, sketches, CAD files or a reference sample: whatever you have. Through the enquiry form you can upload a PDF, image, ZIP, 3DM, STL or OBJ file of up to 20 MB, stored privately. If you have only a concept, tell us where your project stands and we will agree the right starting point.
02 Can you develop a concept into a finished design?
Yes. Our 2D design team resolves concepts into detailed drawings and specifications. 3D CAD modelling and rendering in Rhino and Matrix, followed by 3D wax printing, takes the design to a physical sample. You decide how much of that you need.
03 How long does production take?
Delivery is project-dependent, typically 14–45 days once the sample and production requirements are approved. Timing is confirmed for each project.
04 What capacity do you have?
Our manufacturing facility in China exceeds 7,000 m² and produces more than 10,000 pieces per month, supported by our Hong Kong office. Quantities are agreed per project, from development samples to consistent programmes for multi-location retailers.
05 How do you protect our designs?
Confidentiality and respect for client intellectual property are central to how we work, and your designs are used only for your project. Files sent through our enquiry form are stored privately, and we do not share your designs with third parties without your consent. If you would like a mutual confidentiality agreement before sharing designs, tell us in your enquiry and we will arrange it before files are exchanged.
06 How is pricing provided?
Pricing is provided by quotation, based on the design, materials, stones, finish and quantity. Approved clients can view their private quotations and protected designs in Client Access.
07 Which metals and stones do you work with?
Karat gold in yellow, white and rose, platinum and sterling silver, with plating and specialist finishes. Metal and stone requirements are agreed per project and confirmed in the technical specification before production.
08 How do you check quality?
Every project passes agreed checkpoints: brief alignment, engineering review, sample approval, production readiness, quality review, and release and delivery. Each piece is inspected against the agreed specification, and acceptance criteria are agreed with you for each project.
09 Can ACCA support us before we start designing?
Yes. Research tools and platforms can support your project, and our team contributes manufacturing perspectives on materials and technology. Scope and access are agreed together, so you can join at the research stage and continue into design and production when you are ready.
10 Where are you based, and how do we meet?
Our office is in Hung Hom, Kowloon, Hong Kong, with an established manufacturing facility in China. We meet clients by video call, in Hong Kong or at exhibitions, and you are welcome to start by email or WhatsApp.
Start a conversation
Let’s talk about the design you want made.
Tell us where your project stands. We respond to qualified enquiries with next steps for a meeting.
- Pricing by quotation
- Files stored privately
- Project-dependent delivery, typically 14–45 days
What happens next
- You tell us where your project standsShare files, a reference or just the idea. Design files are optional and stored privately.
- We reply with next stepsOur team reviews your project and replies by your preferred method.
- We agree the plan togetherScope, responsibilities and approvals are agreed together, from the stage where you join.
