Rock/Mineral Identification Help, Possible Kimberlite

[DigitalAlarm]

Hi, I was swimming north Western Australia a couple years ago and I came across what looked like a shark tooth, it was the only reason I picked it up but having not touched it in a while and doing a bit of research on kimberlite, I seen that this rock was super familiar, so I grabbed it back and noticed it’s covered in tiny crystals, behind that is a blue colour, the think that had me thinking it’s a kimberlite is the fact it looks so old, it has lots of red crystals on it, and ts unique corundum shape, have a look for yourself, help is appreciated.

 

[HuntinDog]

Nice rock
Defiantly not a sharks tooth.
Sorry I can't help on an ID though.

 

[Back-of-the-boat]

In my opinion it is white granite with garnets.(the garnets would be the little crystals)

 

[A2coins]

I would say rock also you could get it looked at

 

[dhart45]

I need help identifying these.