This is a professional, high-fidelity 3D CAD model of an elegant solitaire engagement ring, meticulously engineered for digital marketplaces, high-end rendering, and flawless 3D printing. Featuring a striking square cushion-cut center stone secured by a refined four-prong cathedral setting, this design embodies timeless sophistication and clean geometric harmony. The shank features a graceful knife-edge profile that tapers seamlessly into the gallery, offering an exquisite balance between structural durability and delicate, modern aesthetics.The model has been fully optimized with production-ready tolerances, perfect wireframe geometry, and precise stone seat placement, making it an exceptional addition to any digital commercial portfolio or direct jewelry manufacturing pipeline.Technical Specifications & DimensionsThe model is built to standard jewelry production specifications, ensuring structural integrity throughout the casting and finishing processes.Finger Size: US 6.5 (Inside Diameter: 16.94 mm)Center Stone: Cushion SquareCenter Stone Dimensions: 8.00 mm $\times$ 8.00 mmDiamond Equivalent Weight: Approx. 2.65 ctProng Diameter: 1.20 mm (Optimized for secure setting and professional polishing allowance)Total Height (Shank Bottom to Prong Top): 8.80 mmShank Width (Top near Cathedral): 1.85 mmShank Width (Bottom/Base): 1.80 mmShank Thickness (Bottom/Base): 1.75 mmEstimated Metal Weights9K Yellow Gold: 2.54 g / 1.63 DWT10K Yellow Gold: 2.62 g / 1.68 DWT14K Yellow Gold: 2.95 g / 1.90 DWT18K Yellow Gold: 3.53 g / 2.27 DWT22K Yellow Gold: 4.10 g / 2.64 DWT14K White Gold (PdW): 3.29 g / 2.11 DWTPlatinum (Estimation based on volume): Approx. 4.90 g – 5.20 gFully Customizable DesignThis CAD asset is designed with flexibility in mind. The architecture of the 3D model allows for effortless modifications to meet specific client requirements or regional manufacturing standards.Upon request, the following modifications can be provided:Resizing: The shank can be scaled or remodeled to any standard US, UK, or European finger size while maintaining the original design proportions and thickness.Center Stone Accommodation: The prong configuration, gallery wire, and cathedral shoulders can be adapted to host alternative stone sizes (e.g., 6 mm, 7 mm, 9 mm) or different gem cuts, including classic round brilliant, oval, emerald, or radiant cuts.Metal Shank Adjustments: The knife-edge profile can be softened to a traditional half-round or flat profile if desired.Provided File Formats & Package ContentsThe download package is comprehensively organized, including the native parametric files, cross-platform exchange formats, print-ready geometry, and dedicated rendering scenes. All files are neatly archived together in a single .RAR archive for convenient downloading and extraction.1. Native 3D CAD FilesProduction .3DM File: The primary model created in Rhinoceros / Gemvision Matrix. It retains clean, uncollapsed geometry, accurate layer organization, and precise NURBS curves, allowing for direct editing, prong adjustments, or seamless resizing.Rendering .3DM File: A dedicated Rhino scene pre-configured for digital visualization, material assignment, and V-Ray/Matrix render passes, featuring optimized lighting setups and environment mapping.2. Industry-Standard Exchange Formats.STEP: A high-fidelity, lossless CAD exchange format preserving exact mathematical NURBS surfaces, ideal for importing into Autodesk Fusion 360, SolidWorks, or other engineering platforms..OBJ: Universally compatible polygonal mesh file with accurate vertex normals, perfectly suited for importing into external DCC software such as Blender, 3ds Max, or Maya for custom rendering and animation pipelines..FBX: High-performance motion and scene exchange format, preserving spatial coordinates and geometry for real-time visualization engines or interactive presentation setups.3. Print-Ready Manufacturing Files.STL File: A fully closed, watertight, and manifold mesh optimized specifically for 3D printing. The mesh has been verified for structural integrity with zero non-manifold edges, self-intersections, or unclosed boundaries. It is ready for immediate slicing and high-resolution printing on stereolithography (SLA), Digital Light Processing (DLP), or direct precious metal 3D printers.4. Visual Media Asset PackHigh-Quality Renders: The package includes a comprehensive collection of multi-angle digital renderings. These images showcase the ring in perspective, top, profile, and three-quarter views, providing ideal marketing material for e-commerce listings, client presentations, or social media showcases.