time:2023-10-09 source:sznbone Views:
Natural rubies with "ten reds and nine cracks" are extremely rare, without any flaws or cracks. Artificial rubies have the same color, fewer internal defects or crystalline inclusions, are clean, and have larger blocks. As a precious gemstone, natural rubies with a weight of over 3 carats are very rare in the market. If you encounter larger rubies, it is important to pay attention because natural rubies are thousands of times more valuable than artificial rubies. If you neglect them, they will "take medicine".
Natural ruby has a strong "dichroism", which refers to the presence of red and orange red tones from different directions. If there is only one color, it may be red spinel, garnet, or red glass.
Red spinel is very similar to natural ruby, and the two are most easily confused, so special caution must be taken.