In recent years there have been any number of materials being used for countertops. Here is a video put out by Brooks Custom going over the use of zinc in countertops. The narrator goes over the attributes of the materials, typical applications, common finishes. He then discusses the process for making zinc countertops using the zinc sheets as a lamination over a waterproof fiber core.
The video shows plenty of examples and also compares the look directly to stainless steel. There is also a short discussion of how zinc can be welded/soldered to create integral sinks, but the narrator also mentions that for joining sections of countertops, his company usually will do so mechanically, leaving a visible seam.
Edge options are displayed as well as some matching accessories for kitchens, such as range hoods.
While the video is obviously a little self-serving, in that it is one company’s take on the product and what they offer, it does provide some interesting insight into the material as a countertop option.
You may also be interested in this video on how stainless steel countertops are made.