There are some fast render programs out there if you have a fairly good PC -

Octane is affordable and pretty fast if you have a good GPU card. My jewelry renders take about 3 minutes with Octane.

KeyShot is very fast on a modern PC, even better on 6 cores, but outside the budget of most student / hobby artists. My jewelry renders take about 1 minute with KeyShot.

When I purchased Hypershot (the forerunner of KeyShot) in 2008, it was priced the same as MoI. Now it's 5 times that price (granted it has added a lot of features over time).

Ed