1. The original crystal form: the natural product has a barrel shape, a column shape, a plate shape crystal form, the crystal surface is horizontally developed, and the crack perpendicular to the C axis develops, so the fracture is stepped, and some samples have a hard molten shell. The original crystal form of the flame-melting synthetic product is pear-shaped, sometimes artificially broken and spheronized as a natural product, but it is not cracked, so there is no step-like fracture, but a shell-like fracture.
2. Color: The color of the early flame fusion method is too pure and too bright, giving people an unreal feeling. But with the continuous improvement of the production process, this feeling can only be used as a warning, not a basis for identification.
3. Polychromaticity: The mesa orientation of natural products is generally perpendicular to the C-axis. When viewed from the countertop with a dichroic mirror, it is not obvious that dichroism or dichroism is not obvious. The pear crystals of the flame fusion method often crack in the C-axis direction due to stress. In order to make full use of the raw materials, the mesa orientation is parallel to the C-axis, and obvious dichroism can be seen from the mesa. Therefore, when an abnormality occurs in the dichroism observation, it should be alert.
4. Luminescence: Natural sapphire is often inert under ultraviolet light, while flame fusion synthetic sapphire is more active: colorless varieties can have light blue fluorescence under short-wave ultraviolet light; green varieties can be under long-wave ultraviolet light. Orange fluorescence; blue varieties may have light blue-white or light green fluorescence under short-wave ultraviolet light.
5. Absorption spectrum: The visible spectrum of blue, green and yellow varieties in natural sapphire can show the absorption line of three irons in whole or in part, of which 450nm is the strongest, while flame fusion synthetic sapphire may lack these absorption lines or absorption lines. Weak and fuzzy.
6. Growth pattern: The natural growth sapphire often develops a flat growth band around the C axis, and the growth bands in different directions are regularly intersected at a certain angle. However, only curved curved growth lines can be seen in the flame melting synthetic product, which is an important basis for the identification of flame melting synthetic products. However, as the production process is improved or reheated, the bending characteristics of the growth lines are increasingly difficult to observe.
7. Bubbles: Bubbles are another important basis for the identification of flame-melted composites. Although the bubble is small, since the refractive index differs greatly from the refractive index of ruby ​​and sapphire, it has a relatively obvious outline and is easy to observe. The bubbles are generally spherical and can be sporadic, or banded and cloud-like throughout the sample.
8. Synthetic starlight variety: its star line is only on the surface of the gemstone, the star line is complete and clear, and the star line is thinner. Bubbles and curved growth lines are also visible. The star line of the natural starlight species is produced inside the sample, and the star line may be missing, incomplete, and the star line is thick.
Indoor Banner is use indoor ,and print is indoor ink print or sublimation.
Why Choose fabric Banner:
1. high quality good price
2. good service, quick delivery
3. Your inquiry related to our product & price will be replied within 24hours.
4. Well-trained & experienced staffs answer all your inquiries professional.
5. OEM is highly welcomed.
6. Your business relationship with us will be confidential to any third party.
7. High product and service quality.
8. Good after-sale service offered, 2 years warranty. Please get back if you got any questions.
Indoor Banner
Indoor Banner,Indoor Banner Stand,Indoor Banner Mockup,Indoor Banner Material
Anhui LiSheng prinbanner co.,Ltd , https://www.anhuiprintbanner.com