Noun
A
semitransparent
,
uncrystallized
silicate
mineral
and
semiprecious
stone
,
presenting
various
tints
in
the
same
specimen
,
with
colors
delicately
arranged
and
often
curved
in
parallel
alternating
dark
and
light
stripes
or
bands
,
or
blended
in
clouds
;
various
authorities
call
it
a
variety
of
,
a
variety
of
,
or
a
combination
of
the
two
.
Adverb
On
the
way
;
agoing
.