Do diamonds rise to the top of the earth on their own?

Question

Just curious. I don't remember much of my college geology!

Answer 1

Diamonds on earth's surface are commonly associated with Kimberlite Pipes which are a type of highly explosive volcano with roots that tap the upper mantle. So essentially diamonds journey from deep within the earth to the surface as a result of a violent explosive event.

Answer 2

No they are static, It's the weather that erodes the topsoil that brings some into view.

I used to work on the Diamond mines, In the Revolutionary Peoples Republic of Guinea, Many years ago.

The diamonds were in quartz deposits under the topsoil, From 5 feet to 20 feet deep usually.

In South Africa, Kimberly ( the words biggest single Diamond mine) The mine went  much deeper.

Answer 3

Nope. Actually they are deep past the clay layer and only connect to ferrous rock. You have to go dig for them. Unless your in a landslide area and they appear on the surface. The rock it's connected to can be completely destroyed but diamonds are the second hardest substance on the planet. The first is silk, believe it or not.