How to make diamonds fall down?

How can i make diamonds fall down? I mean when i dont touch diamons with ball they still fly in the air, but then ball touch them they destroy and this is right. But how can i make them fall down if ball dont touch them?



Here the code:

1. void OnTriggerEnter(Collider col){
2. if (col.gameObject.tag == "Diamond") {
3. GameObject part = Instantiate (particle, col.gameObject.transform.position,
4. Quaternion.identity) as GameObject;

 

Add a Rigidbody to an object for it to be affected by gravity and other forces.

 

Do you have some invisible collision there? You could put the diamonds on their own collision & the collision yoh want to avoid on another, then disable collision between the two.

https://docs.unity3d.com/Manual/LayerBasedCollision.html