Turquoise stratum
Turquoise is produced in secondary epithermal deposits, with soft waxy luster, compact crystal form, aphanitic aggregate, and some of them are needle-like and nodular. Single crystal is very rare, with fine texture but poor toughness.
Turquoise quality
It belongs to opaque jade, with light blue, medium blue, cyan, green and other colors, variegated colors, dark spots and textures, and high-quality turquoise with dense texture, which is very beneficial to polishing; However, turquoise with poor quality has a lot of porosity, and it is easier to fade due to water evaporation after sunlight.
Reasons for the formation of turquoise color
The green color of turquoise is made of iron, and the blue color is made of copper. The evaluation standard of its quality is that the bluer the color, the better, and the less iron wires, the better.
Turquoise grade:
Fine turquoise, blue in color, soft and uniform in color, without dark blue and light blue spots, with attractive spider net pattern on the surface.
The second grade turquoise is not as bright as the first grade turquoise, and the transparency is not as good as the first grade turquoise. The luster is not strong and the structure is mottled.
The color of the third-grade turquoise is slightly worse, which is not particularly easy to identify. Generally selected from top turquoise.
The fourth-grade turquoise is mostly light in color, with more wires, lower in value, more in defects, poor in luster, not bright in color and no collection value.
Turquoise, also known as turquoise, is an opaque gem, with light blue, medium blue, green blue and other colors, mottled with dark spots and textures (turquoise texture is commonly known as wire). Good quality turquoise is relatively dense, which is beneficial to polishing and coloring; Poor quality and porous, easy to lose water and fade after sunlight irradiation.
The blue of turquoise is made of copper, and the green is made of iron. In a word, the quality evaluation standard of turquoise is: the bluer the color, the better, the less iron wires and the denser the texture.
Indians regard turquoise as a sacred stone and think it comes from the blue sky, which is the source of the air we breathe. Therefore, they believe that Turkish stone has a good effect on lung and respiratory diseases, as well as eye diseases, and can also block radiation damage.