Sapphire is the ultimate representation of blue gemstones, and has consistently remained one of the four precious stones in the world, along with diamond, ruby and emerald. Second only to diamond in hardness, this blue rock is a variety of corundum, a mineral that when red is called ruby.

What color is a blue diamond?

The blue color present in a blue diamond is due to the trace element, boron. Hydrogen is also known to cause grayish blue color in diamonds while nitrogen causes yellow color in diamonds.

Steven Universe Theory: Is Blue The Most Powerful Diamond?

So since the Wanted special event is coming up. I figured that I would do a theory about the Diamonds since it seems we are …

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