Hardness: Its Mohs hardness is 9.
Property:Under the irradiation of specific light sources such as ultraviolet light, most rubies will emit obvious red fluorescence.
Color: It has a variety of colors. Commonly seen ones include rose red, pink, deep red, pigeon blood red, etc.
Hardness: Its Mohs hardness is 9.
Property: It has obvious pleochroism, that is, when the gemstone is observed from different directions, it will exhibit different colors or variations in color intensity.
Color:The colors of sapphires are rich. The blue series is common, ranging from light blue to purplish blue. Cornflower blue and royal blue are top-grade colors. In addition, there are also fancy sapphires in colors such as pink, yellow, green and white.
Hardness: Its Mohs hardness is 7.5-8.
Property: It has a unique birefringence phenomenon and usually contains various inclusions inside.
Color: Emeralds have green as their main color tone, and their green color ranges from light green to dark green.
Hardness: Its Mohs hardness is 9.5 .
Property: A pure colorless diamond is as transparent as pure water.
Color: Moissanite also come in other rare colors such as red, green, and purple.
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