http://b4hntuy3fimfh2227vf4f74emnya7p35i5brtqujs6leqvtclfwvjbqd.onion/doc/physics/diamonds-crookes/The%20Project%20Gutenberg%20eBook%20of%20Diamonds,%20by%20William%20Crookes..html
The miner may toil fruitlessly for months,
and then come across a pocket of stones,
where they have been swept by some eddy,
by which he will net several thousands.
Diamonds from the “river washings” are
of all kinds, as if contributed by every
mine in the neighbourhood. They are
much rolled and etched, and contain a good
proportion of first-class stones; they are
of very good quality, as if only the better
and larger stones had survived the ordeal of [12] knocking about.