While there are no ‘official’ 4Cs for grading colored gems
as there are with diamond grading, many of the same principals apply.
Here are the 4Cs as they apply to colored gemstones:

Clarity

You should look for stones that have good clarity
--no blemishes, cracks or severe inclusions.

Of course, in lighter colored stones, it may be less important than in darker stones that have deeper colors
that can mask blemishes. However, flawlessness in colored gems is even more rare
than in diamonds.

Color

Their color should be vivid, even and saturated throughout the entire stone.
Unfortunately, there doesn’t yet exist a standardized system for
evaluating the color of gemstones, like the GIA scale used in evaluating diamonds.

Cut

A gemstone’s cut does not affect its value to the same extent that it does with a diamond.
However, its cut does affect the depth of the color seen, the
size of the gem and the liveliness of the stone.

A stone with good color will only be enhanced by a good cut,
while a poorly cut colored gemstone can turn out looking dead and lifeless.
In gemstones, the deeper the cut, the deeper the color.

Carat

As with diamonds, weight in colored gems is measured in Carats.
One carat is 200 milligrams. Bear in mind that size and weight are not the same thing,
since some gemstone materials are denser and therefore heavier than
other stones of the same size. Since stones of different species occur in different sizes,
their rarity at certain sizes can affect their value.

Gemstone Grading Certificates

Unlike the diamond industry, the use of certificates or grading reports
for colored gems is relatively new and lacks a worldwide standard.
Consequently, very few stones are actually accompanied by such reports.
They are very useful, however, in determining if a particular stone is natural or created
and if they have been treated or enhanced in any way.

Ultimately, the best way to determine a stone’s quality is to have a trained jeweler look at them.

RING SIZING
Always make sure your finger size before you place ring order.
If you are not sure about your finger size, you can use our
"Finger Sizer" chart for a guide.
If buying for a friend, just ask him or her to do the Step 1 and 2.

Step3: Place the mark on the "X" of this finger size chart
and just print out. Extend the paper strip,
the # indicates at the end of the paper strip is the correct finger size.

MODERN BIRTHSTONE CHART

ZODIAC BIRTHSTONE CHART

ANNIVERSARY GEMSTONE CHART