PokeScience: How much is Mega Diancie worth

We all know that diamonds are a girls best friend and that they can cost a lot of money.
These precious gems are renown for their beauty and their rarity and are used primarily as jewelry for the ladies.
But how do you judge the value of a diamond?
And most importantly, how much does that pretty diamond on Mega Diancie's head cost?


Let me introduce you to the 4 C's of diamonds:
Carat (weight)
Clarity (how clear or cloudy, caused by imperfections)
Cut 
Colour

So how does Mega Diancie fare?

Carat
The weight of diamonds is measured in a unit known as carats where 1 carat is equal to 200mg.
From the corocoro information, we know that Mega Diancie's head diamond is more than 2000 carats.
Mega Diancie's weight is 61.3lbs or 27.8kg. Now if we assume that about 75% of Diancie is diamonds (leaving room for the body and organs and whatnot), we can estimate there to be 104250 carats of diamond on Mega Diancie's body.

Clarity
Corocoro has given us another gem of information, it says "The impurities upon it's body's surface have fallen away, and it sparkles so brilliantly when reflecting light that you cannot look directly at it".
This tells us that Mega Diancie can safely get the highest rating for clarity, an F or IF (flawless/internally flawless).

Cut
The diamond on Mega Diancie's head is a heart shaped diamond, however the rest of it's body diamonds do not have a significant cut. Diamonds are generally cut in such a way that makes the refract light within and seemingly emit light. Apart from the head diamond, the other diamonds do not really have much of a useful cut.


Colour
Diancie's diamond is obviously not the standard clear variety, in fact it is quite pink. Coloured diamonds are far more rare than white diamonds. These fancy diamonds only make up 0.01% of the diamonds in circulation and therefore this jacks up the price of these fancy gems. Mega Diancie is made up of vivid pink diamonds that are not too deep and not too pale in colour.


Verdict
Mega Diancie can be broken down into 2 valuable parts. The 2000 carat heart shaped diamond on it's head and the shapeless 102250 carats of flawless diamond that make up the rest of it's body.

In 2013; a flawless, pink oval cut diamond weighing 59.6 carats called the pink star (pic on right) sold for $83.02 million.
This diamond shares all of the same characteristics as Mega Diancie's diamonds; same quality and same colour.
I have found a rough conversion from oval cut to heart cut at
heart = oval x0.925.

Therefore, if it were a heart cut diamond of the same carat weight, it would be worth $77 million, giving it a value of $1.29 million per carat.
Therefore, on it's own, the head diamond of Mega Diancie is worth $2.583 billion.

The body gems, assuming a very low estimate of 70% of the heart cut diamonds worth per carat. would come out at $903000 per carat and $92.332 billion total worth.

Giving a grand total of $94.915 billion.

Definitely worth the masterball!