8,000 Year old Granite Bowl

Casually listed in the catalogue of the Metropolitan Museum of Art (MET) is this beautiful bowl from Syria. Dated at 8,000 BC.

How did they make this and with what?

“Using only stone and sand to shape and polish objects, Neolithic stoneworking reached extraordinary levels of sophistication.”

• The stone and sand must be diamonds then….
• How long will it take to hollow out a solid piece of granite with stone and sand…. by hand…. 
• Why bother making a bowl from granite when clay or a softer stone will do?

What do you think?

Source: MET Museum