Cholesterol stones | Mixed stones | Pigment stones | |
Sex (Female/Male) | 16/0 | 27/3 | 45/3 |
Shape | Rounded 14, Faceted 2 | Rounded 12, Irregular 11, Faceted 3, Laminated 4 | Irregular 35, Faceted 9, Laminated 4 |
Colour | Pale Yellow 9, White 7 | Greenish 4, Red 8, Brownish yellow 18 | Blackish brown 18, Black 30 |
Surface | Smooth 16 | Smooth 19rough 11 | Smooth 7, rough 41 |
Weight (g, mean) | 5.7 | 1.9 | 3.2 |
Character | Soft 13hard 3 | Soft 24hard 6 | Soft 32, hard 16 |
Size (cm, mean) | 0.9 × 0.9 | 0.5 × 0.6 | 0.7 × 0.8 |