Product OverviewThis premium 3D CAD model features a classic and timeless solitaire engagement ring, meticulously engineered for high-end jewelry manufacturing. Designed with optimal proportions and precise geometric symmetry, this model delivers a flawless balance between aesthetic elegance and structural integrity. The design showcases a prominent princess-cut central gemstone securely held by a refined four-prong setting, integrated seamlessly into a polished, tapering shank.

The model has been fully tested and optimized for professional 3D printing (additive manufacturing) and subsequent investment casting. All filleting, tolerances, and wall thicknesses comply strictly with industry production standards, ensuring a smooth transition from digital asset to physical fine jewelry.

Technical SpecificationsRing Size: US 6.5 (Inside diameter: 16.92 mm / 0.666 inches)

Shank Width: 1.85 mm (Top near cathedral shoulder) tapering down to 1.80 mm (Side/Bottom)

Shank Thickness: 1.75 mm at the base

Total Height (Base to Prong Tip): 8.55 mm

Prong Diameter: 1.20 mm (Provides excellent structural support and sufficient material for professional stone setting)

Setting Style: Cathedral-style four-prong solitaire mount with a structural gallery wire for maximum stone security and light performance.

Gemstone DetailsCentral Stone Shape: Princess Cut

Dimensions: 8.00 mm x 8.00 mm

Estimated Carat Weight: Approximately 3.21 carats (Based on diamond mass calculations. Actual weight will vary depending on the specific gemstone material used).

Metal Weight Estimates (Calculated from CAD Geometry)Yellow Gold 9KY: 2.58 g

Yellow Gold 10KY: 2.66 g

Yellow Gold 14KY: 3.00 g

Yellow Gold 18KY: 3.59 g

Yellow Gold 22KY: 4.16 g

White Gold 14K PdW: 3.34 g

Available File Formats & Package ContentsThe download includes a comprehensive set of file formats organized to fulfill different production, visualization, and archival needs. For convenience, all formats are compiled into a single, well-structured RAR archive, alongside individual file access.

Primary 3DM File: The original native Rhinoceros file containing clean, uncollapsed geometry, ideal for modifications, resizing, or manufacturing adjustments.

Rendering 3DM File: A dedicated scene file prepared specifically for digital rendering, featuring organized layering, material assignments, and optimal camera angles.

STL File: A high-density, fully closed, water-tight polygonal mesh designed for flawless 3D printing via SLA, DLP, or MJP technologies. The mesh contains zero non-manifold edges or self-intersections.

STEP File: A standardized NURBS format for seamless compatibility across various CAD and engineering software platforms.

OBJ File: A clean quad/triangle mesh format compatible with major polygonal modeling and texturing applications.

FBX File: A high-fidelity exchange format preserving scale and basic scene hierarchy, suitable for integration into real-time renderers or digital portfolios.

High-Resolution Renders: A selection of professional, multi-angle digital preview images demonstrating the ring's geometry from top, front, right, and perspective views.

STL Mesh QualityThe STL file included in this package has been generated with strict adherence to manufacturing requirements. It features a high polygon density to ensure that all curved surfaces, including the inner shank radius and rounded prong tips, remain perfectly smooth after 3D printing and casting, eliminating the need for extensive manual cleanup.