Krause
This is a very abstract concept photo I'm using here - The ideas would be to incorporate beams or other wood materials somewhere in the kitchen to make more sense out of the stone. Having only one rustic element feels a little off. Light perimeter cabinets and a darker island that picks up a color in the stone could work. Are they willing to refinish the floors? A warmer brown would be nice.
This is the only visual I could find with a dark painted surround paired with dark stone and light built-ins. I have to say, visually, I prefer the lighter surrounds in the other images. Perhaps the "dark" comes in with dark finishes in the furniture, lighting and accessories? Could the dining room have a darker wall covering to bring in that depth you're after?
Dining room wall covering concept
Q