What are the factors that affect the price of blue tourmaline

1.Color. Tourmaline is best colored by rose, purple, green and pure blue and watermelon, followed by pink and yellow, colorless and black at the second.

In the same color, it is divided into 4 grades according to the intensity of the color, which are intense, medium, light, and dark! In addition, the more colors of single crystals, the better, such as bicolor tourmaline, tricolor tourmaline, etc.

2.Clarity. Tourmaline requires crystal clear, the more transparent the better, the better the quality, and there should be no obvious haze or opacity.

In the crystals of some tourmalines, there are many needle-like inclusions that show a cat's eye effect, and this effect is mostly green-colored tourmaline. Any tourmaline with this cat's eye effect will increase its value, but the key to evaluation is its color vividness, transparency and blockiness, as well as the discoloration effect. Tourmalines with obvious discoloration are very rare, which is why they are highly valuable and are sought after by collectors.

3.Weight. The bigger, the more valuable. For tourmalines of the same quality, the same color and the same clarity, the larger the particles, the higher the particles.

4.Cut. Workmanship, the inspection is tourmaline carvings, bead chains, and the level of appearance polishing technology. Compared with the tourmaline ring surface, the main assessment is the cut of its surface, the cut should be regular, symmetrical, and polished. Failure to do so will affect the value.

5.Origin. The traditional premium origin is Brazil. Africa has also seen the production of tourmaline in good colors in recent years, especially some rare varieties such as Paraiba and Canary Yellow Tourmaline.

Hello, reference diamonds, nothing more than color, clarity, size, cut.

Color Size Inclusions.

And whether there are special optical effects, such as cat's eyes.

Tourmaline depends on the factors: watermelon tourmaline in the domestic market per gram of **, the quality of 80-150 per gram, some of the better carved pieces are priced by the piece rather than by the gram. 1 There are several types of watermelon tourmaline, with the most expensive being the more transparent.

2 The ** of watermelon tourmaline is not only related to color and transparency, but also has a lot to do with the size of the bead. 3 If the overall color of watermelon tourmaline is dark, except for the few colors we said, it is dark beads, and it will not be high. If the overall color is bright, **will follow**.

4. Size: According to the common bead diameter within 10mm, the average color of watermelon tourmaline, the overall is not too showy. A bracelet is about 2,000.

If the bead diameter is more than 10mm, the overall color of the watermelon tourmaline is gorgeous, ** will be tens of thousands. The best watermelon tourmaline is the same as two watermelons cut with the same knife, with a circle of green skin around the perimeter and a red flesh in the middle! The raw ore requirement of this watermelon tourmaline is that the longitudinal axis axis is red, and the outer edge of the axis is green!

Judging from this requirement, there are very few watermelon tourmalines that can reach gem quality. As far as ordinary watermelon tourmaline is concerned, in terms of color: the proportion of red and green in color is obvious, the red-green boundary is obvious, the red color is beautiful, the green is conspicuous, and the red and light watermelon tourmaline is a better watermelon tourmaline!

In terms of clarity, the crystal is transparent and flawless, and there are no obvious ice cracks and other impurities.