Diamonds are more valuable than coal.
Diamond is more dense that coal.
Of equal weight, gem-quality diamond is more valuable than silver.
No. coal is coal and diamond is diamond. They are both formed from carbon, but diamond is much harder than coal.
A natural diamond will always be more valuable than a lab-created diamond, given the same clarity, colour, carat weight and cut of the two comparables.
blue
By weight, a gem-stone quality diamond is more valuable than oil.
because it is found rarely and more dense than coal
Yes, if it is pure natural sapphire it will be worth more than a diamond.
Diamond and Uranium
No, but Iridium is more valuable.
Carbon!!!! Carbon has three allotropes, they are Diamond Graphite (coal) Buckyballs ( Buckminster Fullerene).
A diamond is more valuable than a zirconia, given that they are equal weight, cut, clarity and colour.