Hi there - We are so sorry. This image is from a magazine partnership, and unfortunately we do not have access to information about the non-plumbing products.

We love this room too and wish we had more information about it.

The countertop looks like it is a solid white quart, something like this: http://www.dupont.com/products-and-services/construction-materials/surface-design-materials/brands/zodiaq-quartz-surfaces/products/zodiaq-all-colors/sub-products/snow-white.html. The thickness throws me off though, because I don't know any quart materials that are thicker then 3CM (1 1/4"), and this looks thicker.

It's probably a mitered edge.