Filed in Manufacturing — June 1, 2026
From 3D file to finished jewel: steps to anticipate
A step-by-step reading of the transition between modelling, printing, casting, workshop adjustments and final control.
The 3D file is not yet the finished jewel
A validated 3D file is a working base, not a finished piece. Between the digital model and the actual jewel, there are several technical stages, each with its own constraints. Anticipating them in the file helps avoid costly corrections once manufacturing has started.
CAD lets you check proportions, stone placement, metal thicknesses and overall coherence. But it does not simulate how an alloy behaves during casting, the precision required for setting, or how polishing renders on a fine surface. The transition from file to workshop requires careful preparation.
3D printing: validating volumes before casting
Before pouring metal, the file is printed in resin or wax. This physical prototype lets you check real volumes, proportions and dimensional coherence with the planned stones. It is often at this stage that a too-tight stone placement, a too-thin shank or insufficient wall thickness is detected.
If the prototype does not match the expected result, correcting the file at this point is far simpler than after casting. An adjustment on the file takes a few hours. A correction on cast metal takes more work and may compromise certain characteristics of the piece.
Casting and workshop adjustments: from rough to structure
Lost-wax casting transforms the model into rough metal. The piece comes out of this stage with its general shape, but it is not yet finished: surfaces are rough, certain areas need to be worked on, and the prongs or bezel may need adjustment before setting.
Workshop adjustment prepares the piece for the next stages: regularising thicknesses, finishing the setting zones, bringing to final dimensions. This is the stage where the piece begins to resemble its final result, before polishing.
Setting, polishing and visual inspection before shipment
Setting fixes the stones into the mount. Depending on the type planned — grain, pavé, bezel, channel — the technical constraints and workload vary. The setting type must therefore be specified from the CAD stage, as it conditions metal thicknesses and the structure of the setting zones.
Once setting is complete, the piece is polished. Polishing reveals the final surface condition and determines the overall brilliance of the jewel. Before shipment, a visual inspection validates apparent setting, visible finishes and coherence with the elements approved at the start of the project.
Anticipating these stages from the modelling phase
Every manufacturing stage is connected to decisions made in the 3D file. A too-thin wall complicates casting. A badly dimensioned stone placement creates a problem at setting. An overly complex surface extends polishing time. Building these constraints into the CAD reduces back-and-forth between the file and the workshop.
For diamond projects, coordination between the 3D file, stone sourcing and manufacturing must be thought through together. A diamond's shape, size and pavilion height directly influence the bezel structure and the possible setting type. The earlier these details are specified, the more predictable the manufacturing process becomes.
