The 6 Infinity Stones were immensely powerful gems tied to different aspects of universe, created by the Big Bang from six singularities.
Space (blue): Gives the power to teleport yourself and others
Mind (yellow): Gives the power to contol others' minds
Reality (red): Gives the power to change reality/create illusions
Power (purple): Gives the power of Power
Time (green): Gives the power to travel, pause and rewind time
Sould (orange): Gives the power to attack and trap souls in the Soul Realm