Hard archive
Every past Hard puzzle, and only this one: each mode has its own sequence, so Hard #4 and Daily #4 are different minerals. Today's is not listed, because it would give the answer away.
Play puzzle 0
Play puzzle 1
Play puzzle 2
Play puzzle 3
Play puzzle 4
Play puzzle 5
Play puzzle 6
Play puzzle 7
Play puzzle 8
Play puzzle 9
Play puzzle 10
Play puzzle 11
Play puzzle 12
Play puzzle 13
Play puzzle 14
Play puzzle 15- Play puzzle 16
Play puzzle 17
Play puzzle 18
Play puzzle 19
Play puzzle 20
Play puzzle 21
Play puzzle 22
Play puzzle 23
Play puzzle 24
Play puzzle 25
Play puzzle 26
Play puzzle 27
Play puzzle 28
Play puzzle 29
Play puzzle 30
Play puzzle 31
Play puzzle 32
Play puzzle 33
Play puzzle 34
Play puzzle 35
Play puzzle 36
Play puzzle 37
Play puzzle 38
Play puzzle 39
Play puzzle 40
Play puzzle 41
Play puzzle 42
Play puzzle 43
Play puzzle 44
Play puzzle 45
Play puzzle 46
Play puzzle 47
Play puzzle 48
Play puzzle 49
Play puzzle 50
Play puzzle 51
Images are public domain or openly licensed. Each one is credited on the Credits page.