Shooting White Marble tomorrow - Any suggestions?

Hi there community,
I hope you're all well. I am a five year photographer who recently started their own business. I worked out a deal to work out of a studio giving a percentage for the studio space. The owner of the studio secured a tile shoot for a nice sum so even though this is not my strong suit I want to give it a proper go.

As far as preparation I want to give it three looks. High key, low key (with reflections) and a simple product style. We had 1 day of shooting already for the High key set up, getting my RAW's back, I realize that my lights are way too soft and I should have shot in 'harder' light (my photo attached). While I think the composition is okay, it is still very noisy and not quite sharp. For full disclosure, I shot all around the scene at f11 but this is a large composition so I aligned then stacked the image in PS. I'd love to give this a really nice creative kick so any and all critics or suggestions are welcome.


Many thanks!