YAG
YAG is an actonym for yttrium
aluminum garnet, a man-made
imitation diamond. This imitation
stone lacks the fire of a
natural diamond.
YELLOW GOLD Yellow gold is gold
that has been alloyed with
a mix of 50% copper and 50%
silver.
YGF
YGF is an abbreviation for
yellow gold filled.
Y NECKLACE
Usually 16 to 18 inches in
length, this style of necklace
gets its name from its shape
which features a dangle forming
a Y-shape around the neck.
YTTRIUM
A silvery metallic element
of the boron-aluminum group,
found in gadolinite and other
rare minerals, and extracted
as a dark gray powder. Not
a rare earth but occurring
in nearly all rare-earth minerals,
used in various metallurgical
applications, notably to increase
the strength of magnesium
and aluminum alloys.