I primarily use Rhinoceros 3D (Rhino) along with Gemvision Matrix9.0 for the CAD
modeling. These are powerful tools for precision modelling, specifically well-suited for jewellery design. For rendering (creating the photorealistic images), I often use Blender and other visualization tools. Using these professional softwares ensures that the files are compatible with jewellery manufacturing processes (like 3D printing and CNC milling), and that the renders look as real as possible. If you have a preference or requirement for a specific file format or software, let me know – I can usually accommodate special requests.