Here is the full list of all 11 Lozenge achievements.
Play 50 games.
Score 10000 in a single game.
Pop 5000 triangles.
Play 15 games.
Play 5 games.
Pop 1000 triangles.
Pop 300 triangles.
Score 3000 in a single game.
Pop 50 triangles.
Score 500 in a single game.
Score 100 in a single game.