The Color Changes In ALEXANDRITES
1. Sri Lanka – Cool
Even though Sri Lankan alexandrites typically
have brownish to grayish overtones, some lack
these overtones and fall into the Cool category.
In lighter-toned stones, hue changes from green
or bluish green in daylight to purplish red or
grayish purple in incandescent light. Saturation
is low to medium in fine-quality stones, with a
medium to dark tone.
2. Sri Lanka – Warm
Specimens in the Warm category exhibit the
typical brownish to grayish overtones that
characterize many Sri Lankan alexandrites.
Daylight hues are generally yellowish compared
to other alexandrites, ranging from yellowish
green to brownish yellow to the
occasional pure green. In incandescent light,
they usually appear brownish, with yellowish
brown, orangy brown, brownish pink, brownish
purple, brownish yellow, and brownish red
hues. Saturation is generally low to medium,
with medium to dark tones
Brazil
Top Brazilian stones are generally considered to
exhibit the finest color change of any alexandrites.
Most tend to have a bluish component
to their daylight color. Their hues are greenish
blue to blue-green to pure green in daylight and
red-purple to purple in incandescent light.
These colors are often vivid, with medium to
high saturation and medium to dark tone.
Russia
Russian alexandrite can exhibit some of the
finest colors in top-quality material. Hues are
generally pure green to bluish green to green-blue
in daylight and purple-red to purple in incandescent
light. Stones tend to have medium
to high saturation, with medium to dark tone.
Tanzanian
Tanzanian alexandrite is capable of producing
superb color change. Hue tends to range from
bluish green to greenish blue in daylight and
red-purple to purple in incandescent light.Tanzanian
stones typically have medium to high
saturation and medium to dark tone.
India
Hue for Indian alexandrite tends to range from
green to bluish green in daylight, changing to
purplish violet, purple, brownish purple, or redpurple
in incandescent light. Indian stones typically
have low to medium saturation and
medium to dark tone.
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GEOGRAPHIC ORIGIN DETERMINATION
OF ALEXANDRITE
