1, rarity: Gemdoma is a very rare pearl, with scarce output and higher price in the market, which is more valuable for collection, while blue blood beads have more output, higher price in the market and lower collection value.

2. Color: Gemdoma pearls are rich in color and have a unique silver or dark blue hue, which makes Gemdoma very popular in the jewelry market, while blue blood beads are not deep and rich enough, and they are ubiquitous in the jewelry market.