These smooth 6mm round beads are formed from brightly colored Chinese Turquoise. Most beads tend to be on the blue end of the spectrum with well mixed matrix in the brown tones. Beads are uniform in size, well rounded and nicely drilled as you can see from the picture. This is a stabilized Turquoise product. Actual diameters vary from 5.7mm to 6.0mm but are extremely uniform on each individual strand. Strung on 15.5 to 16 inch long strands.