1. Synthetic ruby refers to a ruby synthesized by artificial means, and its composition and structure are different from those of natural ruby. Because the manufacturing process of synthetic ruby is relatively simple, the supply in the market is large and the price is relatively low.

2. The quality and color of synthetic ruby may be different from that of natural ruby. Although the high-quality synthetic ruby is beautiful in appearance, its value and price are relatively low because of its different structure and composition.

Ruby is a common gem, which is very popular because of its bright red color. The red color of ruby comes from the internal chromium element, which makes the ruby glow red under the irradiation of visible light, further enhancing the red color of ruby. Ruby is a natural mineral whose hardness is second only to that of diamond. Its Mohs hardness is 9, so it is wear-resistant and durable. Ruby has always been regarded as a symbol of power and status in history, and is often used in badges and jewels of the royal family and nobles. Because of its rarity and beauty, the price of ruby has always been high. However, there are some fake and shoddy products in the market, such as synthetic rubies and dyed rubies. When buying rubies, we should carefully choose reliable merchants and appraisal institutions to ensure the purchase of real natural rubies.