Dreaming of diamonds is positive and related to hope as per dream meaning and interpretation. The dream means you will be able to solve the hardest of problems you come across. It also means change of luck.
Dream of diamonds and a lot of them means you will see positive development in life. There will be progress through work and contacts. It also means victory in lottery and games.
Dream of diamonds and you see someone else trying to pick it up means lost opportunity. It also means you need to be careful and make use of any opening or breakthrough.
Dreaming of diamonds and you see people you know means progress through cooperation.
Dreaming of you collecting diamonds means you will be finding hidden wealth or treasure. Luck in lottery and other similar things.