If you brake something in a dream, then it shows the release youve finally got. You are able to express all of the anger and frustration. Dreaming that a glass full of water breaks and the water spills on the floor, it indicates the definitive loss of affection. To crack a sword means our victory is over with our enemies (if the sword belong to them), or it signifies our own loss (if the sword is ours). To break a necklace shows our release from another person.
Read more about dreaming of To brake something in other dream meanings interpretations.