Jacques Steyn sloshed through the puddle, one of many on the shop floor, to point out the slicing, whirling diamond blade as it slashed through a thick slab of quartz. The blade worked its magic with ...
WHEN quartz powder, obtained by finely grinding pure Brazilian pebble, is put into neutral water the pH is rapidly lowered to about 6.4. This acidity has been attributed to silicic acid, but such an ...
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