Scope I need a production‑ready CAD model for a solid 18k (AU750) yellow‑gold ring that holds a 12.0 × 10.0 mm emerald‑cut sapphire in a full bezel (no prongs). The aesthetic is Scandinavian minimalism / quiet luxury—clean architectural lines, premium but understated proportions, and a brushed/matte metal finish rather than high polish. This file goes directly to a bench jeweller for prototyping and later small‑batch made‑to‑order production, so accuracy and manufacturability are critical. Key Dimensions & Geometry Stone (nominal): 12.0 × 10.0 mm emerald‑cut. Bezel (full): Seat (inner): ≈ 12.3 × 10.3 mm (≈ 0.15 mm clearance per side). Wall thickness: target 0.7 mm (acceptable 0.6–0.8 mm). Wall height above table: target 1.3 mm (acceptable 1.2–1.4 mm). Corners: crisp emerald corners with full support; light top‑edge break for burnish. Set slightly low for a monolithic “picture‑frame” look. Shank (blank band): Shoulder width: ≈ 3.0 mm. Band thickness: 1.8–2.0 mm (2.0 mm preferred where comfortable). Clean union between bezel and shank; no head or prongs. Ring size: [insert exact size, e.g., AU L / US 6]. Manufacturing intent: hand‑fabricated in 18k from bezel strip & sheet—sections must be realistic (no paper‑thin shells). Level of Detail Subtle satin/brushed grain on metal in renders. Very light comfort fit on the interior is OK, but ≥ 1.8 mm minimum thickness must be retained. Any under‑bezel support/fillets needed for secure setting, without cluttering the profile. Clean, fabrication‑ready geometry (no non‑manifold edges). Renders (Photorealistic) Provide the following views in 18k satin gold with a yellow step‑cut stone (neutral lighting, soft background): Orthographic: top, front, side. Isometric / 3‑quarter “hero”. Close‑ups (macro): bezel wall & seat, bezel–shank junction, brushed texture. (If you prefer, stone can be shown as a neutral yellow sapphire; no mirror‑polish metal.) Deliverables CAD files: Native (Rhino .3DM or comparable) + STEP (.stp/.step) + STL. High‑res renders: PNG/JPG at ≥ 3000 px on the long edge (all views above). Dimensioned sheet / call‑outs (PDF): show bezel inner/outer dims, wall thickness & height, band thickness, and tolerances (±0.05–0.10 mm critical seat; ±0.10–0.20 mm elsewhere). Timeline & Collaboration Draft CAD + quick viewport screenshots: 2-3 days. 1–2 revision rounds for minor dimensional tweaks. Final files & renders within 4-5 days. Please include 2–3 examples of fabrication‑ready bezel rings you’ve modelled.