Diamonds are usually found -- or at least they originate -- in volcanic pipes that bring them up from far below the earth's mantle.
Some rivers flow over the tops of volcanic pipes and tumble diamond stones into the river bed and in some cases, push the diamond stones into the sea.
Just search "pokemon nature guide"...
A pokemon's nature is random. You have to keep catching pokemon to get the desired nature.
A white diamond is unique as it is very rare to find in nature. They can be manufactured, but these can easily be distinguished. This makes the white diamond very expensive.
A ruby is a ruby; a diamond is a diamond. They are different gemstones. Both occur in nature.
'Scarce resource' implies that the resource is uncommon, rare and hard to find, all of which is true for the mineral diamond. As to why diamond is scarce, that's a Mother Nature question, and she's not answering questions here, sorry.
Pure is variable and can be used to define the flawless nature of a diamond.
Harold Diamond goes by Nature Boy.
Mother Nature made the world's biggest diamond.
Mother Nature made the Cullinan diamond, which was discovered by a human in 1905.
The best nature is the Beneficial Nature. It's really hard to get. None of my Pokemon have the Beneficial Nature.
Diamond
All of them and none of them. Every pokemon's nature is differant.