"Jurassic Park" had that pullback on a dolly from the ECU of the mosquito in the amber to a wide shot, which I think was done with a 50mm macro. The issue with that approach, besides the focus-pulling challenge, is whether you can get close enough on a 50mm macro for your diamond insert and at the other end, can you get a wide enough view of the room on a 50mm.
Because if you need to get tighter on the diamond, like on a 100mm macro, it gets near impossible to get a wide shot at the other end of the track (plus you are tracking on a 100mm lens, which is hard to get smooth.)
You could also do this with a big zoom on a dolly, like a 24-290mm Optimo, and start out at the 290mm end for the insert and zoom out, and then start to dolly back on the wider end of the zoom. The trick here, besides burying a zoom in a dolly move, is whether 290mm at minimum focus on the zoom without a diopter is close enough on your diamond. The other issue is the steadiness of the camera at 290mm -- you may want to operate on a geared head.
Another option, as you mentioned, is to combine two shots in post using some sort of morph vfx software to blend them. In this case, it helps if the pullback is sped-up in post to hide the transition in the fast zoom out. You may want to do this anyway because it might get boring to watch a pullback from macro to wide at normal speed.