Gold grains from the Pamp refinery
(Credit: courtesy PAMP S.A.)
1 grain = 0.0648 grams or
0.002083 troy ounces (ii) Spherical particles
of gold widely sold in the jewellery trade for alloying; grain alloy
is also an initial material for the lost
wax casting method. The grain is made by pouring molten gold into water,
but the grains are not of uniform weight and do not correspond to those in (i)
above. Also known as shot.
Grain
(i) One of the earliest units
of weight for gold; one grain being the equivalent of one grain of wheat taken
from the middle of the ear.
15.43 grains =
1 gram
480.6 grains = 1 troy
ounce
24 grains = 1 pennyweight.
Gold grains from the Pamp refinery
(Credit: courtesy PAMP S.A.)