If the bone breaks into three pieces, such that neither person gets a piece of the junction, then neither person's wish will come true.
If a wishbone breaks down the middle it can mean a few things. Some people interpret this is equal luck for those who broke it.
When the pulling of a chicken's wishbone breaks equally, it is commonly believed that both parties will have their wishes come true. This tradition stems from folklore where the person with the larger piece of the wishbone gets their wish.
that its more than just luck but love
Wishbone usually stands for a wish or desire. If the wishbone is unbroken it means the wish will be fulfilled in the near future. If the wishbone is broken or cracked, but all of the pieces are still there the wish will eventually come true. However if the wishbone is broken and a piece is missing, it means your wish will go un-granted.
As far as I can tell it's because you and someone else break it together and whoever breaks off the bigger piece gets to make a wish.
When the top part of the wishbone breaks off during the traditional wishing ritual, it typically means that the person who held the larger piece will have their wish come true. The wishbone, or furcula, is a symbol of good luck, and the person who ends up with the larger fragment is believed to receive a favorable outcome. This practice is rooted in ancient customs, where the wishbone was seen as a charm for making wishes.
The wish bone is dried and then two people each curl a little finger round the wish bone. They then pull until the wish bone breaks into two pieces. The person who has the largest part of the wish bone, is said to be granted a wish, provided the wish is kept secret.
A mineral that breaks into jagged pieces exhibits fracture.
In the case of that rare and strange event, you would both get your wish.
Weathering and erosion breaks rocks into smaller pieces.
Wishbone - 1995 The Prince of Wags 2-3 is rated/received certificates of: USA:TV-Y
People believe drying the "wishbone" of a turkey, then having two people making "wishes" while pulling on the two sides, is lucky. When the wishbone breaks, the person holding the larger piece is supposed to have their wish come true.