Paraiba comes in both blue and green, with blue Paraiba being the most expensive.
The Afghan blue-green tourmaline that Shale exchanged couldn't possibly be Paraiba, although it's been heard that Afghanistan produces Paraiba.
Li Xiu saw the blue-green tourmaline that Shale obtained, realizing it wasn't quite what he had imagined. Afghan blue-green tourmaline blends blue and green together, rather than showing distinct watermelon tourmaline colors where red is red and green is green.
The blue-green tourmaline color is incredibly fresh, combined with the bright quality of Afghan tourmaline, making it indeed look very appealing.
Shale was leading Li Xiu to open the Trial Gate when they were suddenly blocked by someone ahead.