Nowadays, rich people will buy some jewels to collect, but when buying these precious jewels, we should be careful not to be deceived by some lawless elements. Many people don't know whether a gem is true or false, and they don't know what is good. Then, let's look at the classification of aquamarine in birthstones.

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Aquamarine aquamarine grade classification

Beryllite belongs to silicate crystals in mineralogy, which can show different colors, mainly depending on the genesis and formation conditions of the ore.

The following are common:

(1) The color of beryl containing chromium ranges from light to dark green, blue-green and yellow-green, and it is a very precious emerald.

(2) Iron: azure or aquamarine.

(3) Containing cesium, lithium and Morganite: the color is rose red, which is called cesium beryl.

(4) beryl containing iron, golden yellow and light lemon yellow is called golden beryl.

(5) The beryl containing titanium and iron is dark brown, which is called dark brown beryl.

(6) Colorless and transparent beryl is called Goshenite.

Beryl is a silicate containing beryllium and aluminum. The color of aquamarine is beryl from sky blue to sea blue or blue-green. Its color formation is mainly due to trace ferrous ions (Fe2+), and bright and flawless bright blue to light blue is the best.

Aquamarine is mainly produced in the pegmatite deposit-sugar albite pegmatite, and the most famous aquamarine producing area in the world is in minas gerais, Brazil. Followed by Russian, China and other regions. The common crystal morphology is hexagonal columnar, followed by hexagonal bipyramid, and the aggregates are mostly columnar.

Transparent to translucent. The refractive index is 1.567- 1.590, and the birefringence is 0.005-0.007. Polychromaticity is obvious, from blue to blue-green. X-ray irradiation does not emit light. Good toughness.

Quality evaluation of aquamarine

The quality evaluation of aquamarine is evaluated from the aspects of color, clarity, cutting and weight. Pure color, no gray, no dichroism, strong and bright color has the highest value. Some aquamarine with directional inclusions can be processed into cat's eye effect or starlight effect, and aquamarine with special optical effect is more expensive. Aquamarine with the same color, clarity and cut, the greater the carat weight, the higher the value.