The three add-ons that I’m recommending you download and install, are outlined below… Again, for the installation of these, I refer you to my instructional video covering this.
JewelCraft
Jewelcraft is an add-on which will allow you to add gemstones and prongs to the model you have designed. You must had a workable model that you have already drawn up. Jewelcraft helps you to place stones, add prongs and use cutouts to modify your model for jewelry design work and ready it for 3d printing.
PBR Materials
The PBRmaterials add-on is not one that is really needed. However, if you are like me, and wish to draw up a wonderful design, render an image of it to look real, this add-on works well. It will allow you to add materials to your objects, such as Gold tones, silver tones, etc… These materials render out a realistic image of your design. This allows us to print the image and give it to a customer, so that they can see what the finished product will look like.
Simple Asset Manager
This add-on is like a built in library for Blender 2.8. Once it is installed, you can assign a folder from your computer to it. In the folder, you can add objects you wish to use as library objects that you can import into other designs you create.