Cut-card builder
Pick round, oval, cushion, emerald, pear, marquise, radiant- or princess-style; lock table, depth, angles, stars, lower halves, girdle, culet, and L/W with live range cues.
Education · cut proportions · light paths
GleamJewel Cut
Lock table, depth, crown, and pavilion—then watch labeled light paths show return, leakage, and fish-eye risk before you buy, sell, or recut.
Proportion & optics workbench
for jewelers & gemology students
24+Seeded atlas cut cards
12Client-brief drill scenarios
8Silhouettes in the builder
100%On-device · no account
Illustrative marketing figures; not App Store metrics.
Asymmetric workbench tiles
Every tile maps to a core loop step—build the card, read diagrams, diagnose looks, drill briefs—without leaving the device.
Dual diagrams + ray sketch
Proportional top facet map and side profile with color-zoned guides; toggle labeled bounce paths for return, leakage, and fish-eye risk—badge-marked educational model only.
Look diagnosis & recut math
Explainable tips for nail-head, windowing, dark center, and steely shallowness you can edit; load as-is proportions and see approximate weight retention plus face-up diameter shift.
Atlas, drills & side-by-side
24+ seeded exemplars, 12 client-brief scenarios with pass/fail deltas, and pin-two compare with overlaid profiles plus ray-summary chips—fully offline.
Glossary & angle sweeps
Hotspot overlays on a master brilliant for every major facet group; sweep crown or pavilion and plot a simple light-return proxy so steepness trade-offs stay visual.
Local library & share sheet
SwiftData cut cards searchable by shape and tag—no accounts. Export a proportion summary image; Privacy, Terms, and lab-non-affiliation screens always one tap away.
Not in scope
Not a clarity-inclusion plotter, not a metal-alloy melt ticket, and not a grading-lab clone—pure proportion-and-optics education.
Built for the bench and the classroom
GleamJewel Cut is a proportion-and-optics workbench for bench jewelers, custom-engagement shoppers, hobby faceters, and gemology students. Build a full cut card—silhouette, mm or linked carat mass, table %, total depth, crown and pavilion angles, star and lower-girdle halves, girdle, culet, L/W—then read dual top-and-side diagrams and a physics-lite ray sketch that tags crown return versus pavilion leakage.
Diagnose nail-head, fish-eye, windowing, and dark centers from the numbers you entered, estimate recut weight retention, drill seeded client briefs, and compare two cards side-by-side. A rich offline atlas keeps the library, editor, and drills full from first launch.
Educational approximation only. Ray sketches and look diagnoses are teaching aids—not laboratory grades, purchase guarantees, or professional appraisal substitutes.