Your question assumes that a diamond has changed hands for money. Many important diamonds, however, have never been sold, but have been owned based on the stone being a spoil of war or a gift to royalty.
The 'most expensive diamond' may be in regal crown jewels owned by a nation state. The British and Thai crown jewels are examples of magnificent diamonds held this way. Because they have not changed hands for money, there are essentially and otherwise priceless.
There are, however, a few examples of expensive diamonds, some with their record per-carat prices:
How do you get 1000000 robux for free?
How do you spell water with 3 letters?
How old is Danielle cohn?
Give me food and I will live give me water and I will die what am I?
Are Danny Devito and Joe Devito related?
What is slappy phone number?
How do you put space on name on roblox?
How did chickenpox get its name?
What is doomscrolling?
How did the Wiffle Ball get its name?
Do schools still teach cursive writing?
Can eggs break inside a chicken?
Why do books come out in hardback first?
What happens when a beehive gets too full?
What is the difference between an optometrist and an ophthalmologist?
Is XeF3 plus polar?
Ano ang kahulugan ng iskolarling pagpapahayag?
WHAT IS THE EXPECTATION ON THE SUBJECT NSTP AND TO THE INSTRUCTOR AND CLASSMATE?
Who is the youngest goalie to win the Stanley cup?
Which of the following statements is true about storing classified documents?
Is Jaroslav Jirik is to say Pavel Novotny maried?