Hi! Unfortunately, we are not able to give the answer to your question since we specialize in custom cabinetry and do not sell countertops. We hope you'll have a nice day!

Hi Fiona FNB, it looks like a quartzite of some kind. I would take this image to your local stone supplier and they should be able to help you find what you're looking for.

It resembles Taj Mahal Quartzite, maybe start there and see whats available in your area.