Lavastone can be an extremely beautiful and durable option, if money is no concern.Slabs are cut from large chunks of dense volcanic rock.The slabs are cut to size, glazed and fired in a kiln.The kiln fires at over 1800 F. The glaze crazes during cooling - the signature mark of lavastone.
The finished product reminds me of stoneware pottery.Almost an color of glaze is available, which is great for making a bold statement.The tops are extremely heat and cold resistant.Not to mention, water-proof, stain-proof, chemical resistant and UV stable.
Of course the biggest drawback is the cost.Second drawback is availability.It can be difficult to find someone in the US who works with lavastone.PyroLave is the leading manufacturer, and they do have a US office.
Lavastone is unquestionably a quality product.But I still prefer the natural stone look of granite over the glazed pottery look of lavastone. (the price also has something to do with my preferences)