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Know More
 Gemstone
Size
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Each gemstone is comprised of a unique
combination of trace minerals. These create tiny fractures or
mineral flaws called “inclusions.” Under magnification or by their
careful unaided eye, gemologists take note of inclusions as well as
“blemishes” or surface irregularities in gems. Clarity grades range
from VVS (very, very slightly included) to I3, in which inclusions
are prominent and severely affect the gemstone's beauty.
As
with diamonds, the type and location of inclusions are more
important than the fact that inclusions exist in the gemstone. It is
important that any inclusions do not penetrate too deeply into the
stone, because this may affect the gem’s durability, causing it to
crack or break. Deeper colors can mask imperfections better, so it
is more important in lighter colored stones to select those with
fewer blemishes or inclusions.
Flawlessness in gemstones is
even more rare than in diamonds. Gemstones with few or no inclusions
are available, but they are usually extravagantly priced. Even most
high-end gemstones are at least slightly included. Being more
common, sapphires in jewelry tend to have higher clarity levels than
rubies. Internally flawless sapphires are very rare, but internally
flawless rubies are extremely rare. For the best value, look for
sapphires that are moderately included, and rubies that are
moderately to heavily included. In general, look for gems that are
lightly to moderately included.
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