Is there a door between the two rooms, and if so will it generally be closed?

If yes, I think you're safe with a mismatch if it doesn't bother you aesthetically.

If no, or if mismatch would bother you I would try to find a remnant that coordinates well with your quartz, even if it's a different stone.

Alternatives could be:

-tiling the counter in the same tile as your kitchen backsplash or floor (tile counters are passe but in a laundry you won't have the same challenges with a tile counter that you would in a kitchen.)

-wood that coordinates with your cabinets or floor. It could be reclaimed, repurposed, or preformed counters from a big box store/Ikea.

-stainless steel (might not be cheaper but sometimes you can find repurposed industrial kitchens for sale)

-cement (some people swear they've had success with diy)

-penny tiles. Literally, 1¢ pieces adhered to a substrate.