On Mon, 24 Aug 2015 18:33:39 -0600, graham > wrote:

>On 24/08/2015 4:59 PM, Xeno wrote:
>> On 25/08/2015 8:08 AM, Dave Smith wrote:
>>> Oh sure. Those coffee beans are so much tougher than the steel burrs.
>>
>> Swing by the Grand Canyon next time you're in the area. Water erodes
>> stone! ;-)
>>
>Actually, it's the sediment carried by water that erodes stone.

Sediment helps, but water can do it perfectly well on it's own, being
a solvent and all...

Some waterjets use nothing more than water (without abrasives) for
cutting, so how does that work if water cannot erode stone on it's
own?

We have a lot of granite around here that gets eroded by very pure
water, again no abrasives required.