this is based on ray ban aviator glasses. colour is customizable.this one set to dark grey.they have all Gradient color I also a blue and one gold on cgtrader too.https://www.cgtrader.com/3d-models/sports/equipment/ray-ban-aviator-blue-glasseshttps://www.cgtrader.com/3d-models/sports/equipment/ray-ban-aviator-gold-glasses also see blender artist forumand search for (eevee vs cycles _ ray ban glasses) to find it. Its share same material in blender for both eevee and cycles render engine.its looks realistic in blender.for exporting I recommends fbx. have high detail for example screw in handle that you can see it in pictures. also its subdiv ready and for example you can reduce lvl of it in blend file to have lower poly mesh.seperet handle mesh with good origen point for easy rotate in animation and work flow. hdri from hdri heaven(kloofendal_48d_partly_cloudy)with cc0 license and charecter from mb lab and model dont inqulde it. https://blenderartists.org/t/eevee-vs-cycles-ray-ban-glasses/1234426 finally let me know if you have any problem or request about it. best regards