How to identify ruby

Ruby chromaticity is obvious. Under ultraviolet light, ruby ​​has red fluorescence. When magnifying, the gas and liquid inclusions and solid inclusions in ruby ​​are abundant. The faceted gemstones are visible in the right direction and the facets are ghosted. How to identify ruby?

Image method

This method is applicable to faceted gemstones. The optical properties of rubies determine that it is the only red gemstone with a central ring type and a double rainbow overlap. Seeing this image is definitely a ruby. The ruby ​​color is gorgeous, and under the light source, it can reflect the beautiful and moving six-shot star light, commonly known as the six-line, which is caused by the special crystal structure of ruby, which is its unique optical phenomenon.

Hardness method

Ruby is the only gemstone of the red gemstone with a hardness of 9. The cubic zirconia has a hardness of 8.5 and is a synthetic product. As long as the cubic zirconia is scribed with the edge of the ruby ​​to be tested, the runner is ruby, and the person who is not moved is not ruby. This method is applicable to the identification of gemstone materials and various ruby ​​types of rubies. However, it belongs to the damage identification and is used with caution for faceted stones. Do not use the sharp edges of cubic zirconia to scribe the ruby ​​countertop, otherwise scratches will be left on the ruby.

Fluorescent photometry

Among the many red gems, only ruby ​​and red spinel show red-dark red fluorescence under long-wave ultraviolet light. According to this, the unknown red gems can be first checked by fluorescence. The red gems that don't shine are definitely not rubies, and the radiance may be ruby ​​or spinel. Ruby is a heterogeneous body, and spinel is a homogeneous body, which is normally detected by a simple polarizer. The former is rotated four times between the orthogonal polarizers to appear four extinctions and four times bright, the latter being full extinction.

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