diamond gold ring gemstone printable Jewelry 3D print model

I am a designer also a modeler, i have been engaged on Jewelry 3d printing years, I would like to share how to use the 3d Printer to print the design and which way to casting it well. Ring Size: 22 mm(adjustable). Diamond ring 2.58 gDiamond 0.47 ct / 5 mmGemstones 0.06 ct / 1.2 mmAvailable formats upon request: .c4d, .obj, .fbx, .ma/.mb, .lwo/.lws, .3ds, .3dm, .dxf/.dwg, .stl.