Looks like Carrera Marble. Very classic and beautiful.

Copper is naturally anti-bacterial and is non-porous, so it is a more sanitary choice than other sink materials. Copper is known for its green patina, so keep in mind that the color of the metal will change over time. But I find it beautiful all colors.

Make sure that you regularly clean the sink with mild soap and water and keep it dry when not in use. It is also recommended that you periodically apply something like "Renaissance Wax" to maintain the color and aid in better water runoff.

Copper sinks require the same amount of maintenance and upkeep as a porcelain sink. Hand-hammered sinks are an option to prevent water spots from showing. Polished and matte polished copper sinks require the most maintenance. It is recommended that you use a copper cleaner every six months to a year on this finish.

Acidic and abrasive products can remove the patina of the copper, but it should return over time.

Here is a more in-depth guide to copper maintenance depending on finish:

http://www.coppersinksonline.com/store/pc/Copper-Sinks-101-d14.htm

here is some more reading on living finish sinks: http://www.texaslightsmith.com/www/faq.php#faq13

At first glance it would seem that they're easier to keep clean but really, all you're doing is hiding the seam. Though it's a wash from a cleanliness standpoint, undermounts do look better.

It takes up less space on your countertop, There is no sink rim on top of the counter to collect dirt and food particles. Our beautiful undermount stainless steel kitchen sinks are durable, 16-gauge stainless. To ensure a lifetime of beauty, the sink, drain fittings and strainer basket use matching 304 stainless steel. Undercoating and sound pads absorb vibration and noise. Visit http://seamlesssink.com/