CAD Design
From the bench,
backwards.
Conceptual jewellery design with integrated CAD, engineered for production from the first block-out. Not modelled and then “made to work”.
Who we work with
Four kinds of
brief.
The deliverable is the same — a producible CAD file with bench experience built in. The brief that gets us there usually comes from one of four places.
Brands
Jewellery brands developing a new line or extending an existing one. Sizing strategy, variant logic, and production cost per unit are part of the design brief from the first call — not patched in later.
Designers
Designers with a strong creative point of view and no in-house CAD capacity. We engineer the idea without flattening it. The piece stays yours.
Intermediaries
Jewellery shops, designers and bench workshops who outsource the CAD step. Confidentiality by default. We never appear in the chain in front of your client unless you ask us to.
Private commissions
High-budget bespoke pieces routed through a professional intermediary — typically a jeweller or personal advisor. Direct private clients are served through studiojoia.com.
Deliverables
Everything the
workshop needs.
Every CAD Design project closes with the same core delivery package. Specifics adjust to scope —
- Production-ready CAD file. STL or ZBrush, with documented wall thickness, tolerances and casting notes. Ready to hand to any casting house — ours or yours.
- Target-weight design. When the brief sets a retail price or a maximum weight, gram-count is engineered from the first block-out, not measured at the end.
- Photorealistic renders. For client presentation, look-book, or internal sign-off. Multiple angles, neutral backgrounds.
- Live Design Sessions. Every decision — proportion, stone seating, finish — taken with you on the call, not relayed by email.
- Technical drawings on request. Engineering plans, sections and dimensions for workshops that need them.
- Source files on completion. The ZBrush file is yours when the project closes. No vendor lock-in.
Process
Five steps,
no guesswork.
You send the brief.
Sketches, references, written notes, target weight or price if relevant. We reply within two working days with feasibility notes — honest answers on what works, what doesn’t, and what changes if you want to push further.
We quote the project.
Scope, timeline, deliverables and fee — written, structured, no surprises later. If the project grows mid-way (it sometimes does), we re-scope transparently before continuing.
We model with you in the room.
A Google Meet call with ZBrush shared in real time. You watch the block-out happen, weigh in on proportion and mass, and hear the production reasoning behind every decision.
Detail, refine, validate.
One or two follow-up sessions depending on complexity. Stone seating, finish, engraving, wall thickness — all decided in the call, with both sides seeing exactly the same screen.
You receive the file package.
STL or ZBrush source, render set, casting notes, optional technical drawings. Project length depends on scope and complexity. We commit to a timeline in the quote — and we hit it.
Where it matters
The briefs that
most studios get wrong.
Three scenarios where the way Studiojoia Pro works makes a measurable difference —
A
Design to a target weight.
When the brief starts with a retail price or a maximum gram-count, the design has to land there without compromising the piece. Weight gets engineered into geometry, not absorbed by it.
B
One design, every size.
Rings that look right at size 47 and still look right at size 62. Proportion, stone seating and structural integrity are designed once, applied consistently — no per-size re-modelling.
C
Files that cast first time.
Wall thickness, sprue strategy, undercuts and material flow — all resolved on screen, before the file leaves the studio. Fewer failed castings, lower production cost per piece.
Work
Recent briefs,
anonymised.
Case 01
Spiral-set solitaire with double pavé band
The piece
18K yellow gold ring. A 3 mm round brilliant centre stone framed by a spiralling band, set above two pavé courses of 38 round brilliant diamonds (1.5 mm each). The structure splits and reconverges around the central setting, creating the frame from the band itself rather than from an added head.
The brief
A studio design piece built to a real-world specification: integrate a solitaire into a flowing, organic structure without the stone reading as a separate, added-on element. The centre had to feel born from the band — not mounted onto it. The kind of piece we design and produce regularly for clients developing signature work.
The challenge
The difficulty lived in the arm geometry. The band carries a double pavé course along its length, then has to transition — without a visible seam — into the split that opens to frame the centre stone. Holding that flow meant controlling the cross-section continuously as it stylised from the double-pavé section into the curved frame, all while keeping the global volume in balance so the ring sits evenly on the hand and the diamond stays centred when worn. Pavé over a double-curvature surface, a structural split, and a single uninterrupted line — resolved as one piece.
The outcome
A fully producible file, ready to cast: 38 stones seated, casting-ready section thicknesses throughout, and a continuous form with no welded joints. The flow reads as a single gesture, the centre stone sits framed and balanced, and the ring carries its weight evenly on the finger. Design and engineering resolved together — the way every piece that leaves the studio is built to be made, worn and sold.
Credits
Conceptual design, CAD, engineering and render by Studiojoia Pro.
Case 02
Bloom · One design language, three formats
The piece
Bloom — a floral collection built on a single organic design language, adapted across three formats: ring, pendant and earrings. Sculpted botanical forms — petals, branches, leaves — carried consistently from one piece to the next, with each format’s functional hardware absorbed into the design rather than added to it.
The brief
Design once, scale across a family. Take one floral language and resolve it as a ring, a pendant and a pair of earrings — each piece reading as part of the same collection, none looking like a generic body with a different fitting bolted on. A studio collection with a long commercial life across multiple formats.
The challenge
Holding cohesion across three formats with very different functional demands. Each piece needed its hardware integrated into the organic gesture, not stuck onto it: the pendant’s bail shaped as a branch that curves into a suspension point; the earring’s omega clasp absorbed into the structure; the ring’s split shank engineered to support a large central element and keep it balanced on the finger. Ergonomics carried equal weight — a ring comfortable in wear, a pendant that hangs true, earrings light and correctly positioned on the ear. All of it sculpted in organic detail and kept producible: minimum thicknesses, casting viability, no fragile spans.
The outcome
A coherent three-format collection from a single design language, proven in production across all three formats. The functional elements disappear into the botanical form, each format sits and wears as it should, and the whole family casts cleanly. One language, designed once, resolved three ways.
Credits
Conceptual design, CAD, engineering and render by Studiojoia Pro.
Case 03
Organic-claw solitaire
The piece
A solitaire mounting whose head is built from eight organic, branching claws. Instead of plain wire prongs, each claw tapers and curves like a botanical stem, the arms folding back to leave teardrop openings between them — a crown that opens like a lotus around the centre stone. Clean round shank in white metal; shown here as the unset mounting. The ornament is the setting.
The brief
A studio design piece testing whether a solitaire head can be fully organic and still do its only real job: hold the stone. Replace the standard four- or six-prong head with a sculpted, flowering structure — without losing the security, balance and producibility a setting has to have. The kind of signature head a brand commissions when a generic solitaire won’t carry its identity.
The challenge
An organic claw structure is far harder than it looks. Each of the eight arms had to branch and curve as a flowing form while still ending in a tip that grips the girdle of the stone — at the right height, angle and spacing around the centre. The arms tie together through bridging rings that keep the crown rigid; those bridges had to be modelled into the gesture, not bolted on. And the whole openwork lattice of thin organic arms had to stay castable: minimum cross-sections held along every taper, no fragile unsupported spans, clean metal flow through the branches. Decorative crown and working setting, resolved as one geometry.
The outcome
A fully producible solitaire mounting, casting-ready as openwork. Eight claws that read as a single flowering crown yet seat and secure the centre stone; bridging structure that holds the head rigid; section thicknesses controlled throughout so the lattice casts cleanly and wears without bending. Designed and engineered as one piece — built to be made, worn and sold.
Credits
Conceptual design, CAD, engineering and render by Studiojoia Pro.
Trusted by
“A true professional: meticulous, demanding and highly responsive. Easy to work with, and I was delighted with the quality and detail of the work — the final piece was perfectly prepared. I’ve since recommended him to several clients in my network.” — Nicolas Delouche, Founder & CEO · LHEGACY, France
Investment
Every project
quoted individually.
A single bespoke piece, a fifteen-reference collection, and a recurring CAD partnership are three different briefs with three different scopes — in hours, complexity and deliverables. We work on an hourly basis.
Send the brief — we reply within two working days with an estimated hours range, scope notes and deliverables. For integrated projects (design + prototype + production) we provide a fuller estimate. We don’t issue closed fixed-price quotes — fair pricing in CAD work needs honesty about the unknowns, not false certainty.
Start a project
Send the brief.
We’ll engineer it.
Sketches, references, a target weight, a price point, a competitor’s piece you want to push past — whatever you have. Two working days for a reply with feasibility notes and a structured quote.