STL
Ready for 3D printing.
Open the STL in your 3D print software, then set up the print for your machine and material.
01 / STONE INTELLIGENCE
JEWELRY DESIGN.READY TO MAKE.
Stone measurements and a ring style become a 3D-printable STL, an editable Rhino 3DM file, and clear design drawings.
STL · 3D printing3DM · Rhino editing
02 / RING DESIGN
From stone specifications,to the form of a ring.
Start with the stone’s measurements and the intended style. Explore the form and metal appearance through CASTT’s oval solitaire case.
- Specified stone
- 5.03 ct / OVAL
- Model dimensions
- 14.38 × 10.05 mm to be confirmed
- Ring style
- SOLITAIRE
CASTT / OVAL SOLITAIRECASTT render studio screen · Appearance simulation
03 / CASTT DESIGN OUTPUTS
From design,to making.
Print the STL. Refine the 3DM in Rhino. Review the drawings. CASTT connects the design to the next step in making.
3DM
Keep designing in Rhino.
Open and edit the 3DM in Rhinoceros (Rhino). Refine the design and continue your production work.
DRAWINGS
Review the details together.
Share the views, dimensions, and stone information with the people making the piece.
03 / 03From the model to files for making.CASTT / CASE STUDY
PROJECT BRIEF
A solitaire for a 5.03ct oval diamond.
Start with the stone’s weight and measurements, together with the desired ring style.
- Input weight
- 5.03 ct
- Model dimensions
- 14.38 × 10.05 mm to be confirmed
- Ring style
- Oval solitaire
- Proposed metal
- 18K white gold to be confirmed
The specified stone weight and weight estimated from a model are managed separately.
CASTTPROJECT BRIEF
5.03ct
Specified diamond weight
STONEOval brilliant
STYLESolitaire
MEASUREMENTS14.38 × 10.05 × 6.27 mmto be confirmed
STONE SIZE → ESTIMATED CARATEngine formula · estimate ±5%
—ctEstimate ±5% · ct = L × W × D × cut factor × girdle adjustment
- L/W
- —
- Depth
- —
- Ideal range
- —
Stone measurements and style are the starting point for the design.
DESIGN & VISUALIZATION
See the form. Review the design.
Review the ring form, stone, and metal together. Continue in Rhino with the 3DM file, or take the STL into your 3D printing workflow.
- Shape, setting, and material review
- Metal and optical appearance settings
- STL for 3D printing · 3DM for Rhino editing
CASTTMATERIAL & LIGHT
STONEOval
SETTINGFour prongs
METALWhite gold
CASTT / DRAWINGS & PROPOSAL
CASTT / PROJECT OUTPUT02 / 05
CASTTSPECIFICATIONS
- Design
- Oval solitaire
- Metal
- 18K white gold to be confirmed
- Finish
- Polished
Reference values from the actual CASTT project proposal.
Which materials and specifications?
Metal, finish, ring size, and dimensions. The specification sheet brings together the conditions a maker needs to review.
CASTTDESIGN STUDY
STONEOval
SETTINGFour prongs
METALWhite gold
One model. Four ways to inspect it.
Review a perspective view alongside top, front, and side drawings. Dimensions are checked against the original design file before production.
01 / Perspective02 / Top03 / Front04 / Side
CASTTSTONE MAP
OVAL BRILLIANT
Length14.38mm
Width10.05mm
Depth6.27mmto be confirmed
Measured dimensions in the project reference.
Stone measurements guide the design.
Record the stone’s length, width, depth, and details. Specified carat weight and model-based estimates are kept distinct.
ESTIMATE
Material and weight
Labor and finish
Reference date
Connect the design to the estimate.
The proposal records the basis of the estimate, including material, weight, and labor. Pricing and lead time are agreed for each project.
CASTTPRODUCTION NOTES
- Original model
Use the original 3DM as the design reference.
- Stone setting
Review the stone seat and setting with the maker.
- Finish
Confirm the surface finish before production.
What the next maker needs to know.
Pass on the original design reference and the setting, finishing, and production details that need review.
WHY WE BUILD
One design.Ready for the next step.
T2E brings the brief, dimensions, stone seats, and materials into one design engine. Its outputs include STL for 3D printing, 3DM for editing in Rhino, and drawings for shared review.
3Ddesign review
Review the form.
See the stone, ring form, and metal appearance in one screen.
Explore the engine screen ↗4design views
Review four views.
Perspective, top, front, and side. Inspect the same model from different directions.
Explore the drawing views ↗5proposal sections
Bring the details together.
From specifications to production notes. Bring together information for clients, designers, and makers.
Explore the proposal sections ↗Screens are pre-recorded from the actual CASTT and GRAIN engines (appearance simulation). Transition speed does not reflect design processing time.
ABOUT IL JEWELRY
Craft experience.Built into a system.
IL JEWELRY (일주얼리) turns jewelry-making expertise into a design engine that connects ideas to printable, editable 3D files.
Our lead developer trained and practiced in Tokyo, built a career at a Japanese jewelry maison with 80 years of history, and studied for four years at a jewelry college. That craft judgment is built into T2E. Experience from our own brands informs development for customers, creators, and businesses.
80 YEARS
Maison history · A career built at a Japanese jewelry maison with 80 years of history
Craft criteria learned in a maison, brought into a design engine.80 years is the maison’s history, not the developer’s years of experience.A reference to the founder’s professional background.
ONE ENGINE / THREE WAYS TO USE IT
ONE ENGINE. YOUR WAY TO MAKE.
From a first idea to a professional workflow. Explore three ways to work with T2E.
L1Pilot application
CUSTOMERS
Say it. See it.
Describe the ring you have in mind. L1 brings the idea into a 3D view and clear specifications you can discuss together.
- Your words, your style
- A form you can see
- Specifications to share
L2Beta development
CREATORS
Shape every detail.
For designers and students refining a shape. We are developing L2 around dimensions, ring profiles, and files that continue into Rhino editing and 3D printing.
- Explore the form
- Refine dimensions and profiles
- Continue with STL and 3DM
L3Internal application · In development
ENTERPRISE
Your standards. Your workflow.
For jewelry brands and manufacturers. L3 is being developed to connect reference models, stone and material rules, and production files within a brand’s own workflow.
- Brand reference models
- Stone and material requirements
- Files for the next maker
L1–L3 are concept illustrations. Status is shown for each level. Original CASTT evidence is available in the case study. October 2026.
OUR BRANDS / OUR PRACTICE
Three brands. A growing craft practice.
SOU, BEARING, and CASTT are IL JEWELRY’s jewelry brands. The requirements and craft knowledge gathered through each brand inform our shared design engine.
SOU
Wedding jewelryWedding jewelry shaped around personal choices and how it feels to wear.
BEARING
Contemporary silverSilver jewelry for individual tastes and everyday wear.
CASTT
Diamond jewelryJewelry built around natural and lab-grown diamonds.
3D PRINTING / CONCEPT ILLUSTRATION
PRODUCTION CONNECTION
When you need it.Through to a finished piece.
Take the design into 3D printing with STL, or continue editing in Rhino with 3DM. When needed, we can also arrange finished-piece production and delivery through manufacturing partners.
Discuss a production projectLET’S BUILD WHAT’S NEXT
Your next project.Let’s design it together.
Tell us about an engine application, a production project, or a partnership. If you are interested, just get in touch.
Contact us