Good sized palm stone, thick crystal 
Fluorite is a crystal for anti anxiety and helping clear the mind. 
It is great for calming over thinking and bringing emotional balance. 
Also stress relief. 
The piece that broke off is included and could be glued back together if chosen , however when pieced together there is still a chip missing as shown in photos 
It will not affect the healing properties of the crystal at all this is just an aesthetic problem