This video by Reviewed.com, is an interview of a representative of LG Hausys, makers of HI-MACS solid surface and Viatera quartz, who demonstrate how wireless charging technology can be embedded into “smart” countertops. The speaker basically walks you right through how it is done, including which technology they prefer (although do not endorse) and even talk about the cost of it.
Although previous information released elsewhere claims that granite or quartz are not candidates for this technology, this speaker directly opposes that viewpoint and asserts that only countertop materials containing metal will prevent the wireless transmission.
If you are interested in this emerging upsell for countertops, then you should probably give this video a watch.
You may also be interested in this video about embedded wireless charging in countertops.