What kind of lens is required for macro jewelry photography to get everything in focus?

Question

I'd like to know if anybody has any tips regarding the lens I should use to get this kind of image. I'm planning on shooting product pictures of jewelry. I know that usually the go-to lens is macro, but I don't like the fact that I can only focus on the front or the back of the ring; I would like all the piece in focus, just like this image.
I'll number the different options I think were used, but please let me know which you think is the most likely to be used:

macro with focus stacking
tele-macro
another lens? (it doesn't look like a 55/55 as the piece is really focused and sharp, or at least that's my assumption with what I know of photography, please note I'm a jeweler with a personal project trying to take my own pictures as I don't have the budget yet to give the job to someone that really know.)

(source)

Romeo Ninov · Answer

My understanding is you want entire object on focus. So you can do few things:

Close the aperture. But do not go behind f9,f10 otherwise diffraction will make your image softer
Use technique named focus stacking. This need additional equipment to move your camera (or focus) on small steps.
Use different lens. Tilt-shift lens can give you entire object on focus. But they are expensive :(

What kind of lens is required for macro jewelry photography to get everything in focus?

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