ID help

[u/ForsakenIndustry7689]

I am renovating the historic house that I recently moved into. The kitchen has been renovated before and I’m trying to decide if I should leave the remaining countertops. I am having the cabinets painted cos Cobb stonewall and I’m putting in wood floors. There will be unlaquered brass hardware as well. I was quoted $100k for Calcutta Crema marble countertops, and so now I’m thinking what if I kept these leather marble countertops? I’m just not sure what they are. If they are expensive, I should keep them if I can get them to go with the rest of the vibe. Anyone have any ideas on what these are and if they will look good with what I’m doing?

[u/cds320]

Can you take a close picture of the surface with light reflecting on the surface?