Here is the full list of all 10 Mahjong trophies - there are 10 silver.
CLEAR 1 LEVEL
CLEAR 5 LEVELS
CLEAR 10 LEVELS
CLEAR 15 LEVELS
CLEAR 20 LEVELS
CLEAR 30 LEVELS
CLEAR 40 LEVELS
CLEAR 50 LEVELS
CLEAR 60 LEVELS
CLEAR 70 LEVELS