Opacity:

•  Opaque (6)
•  Semi-transparent (4)
•  Transparent (4)
•  semi-opque (2)

Granulation:

•  Granular (2)
•  Not granular (2)

Mono-pigmented:

•  No (2)
•  Yes (2)

Colors

•  Blue (1)
•  green (1)