'Perfect' is relative.
A diamond is valued by its cut -- mine cut in this case, its carat weight, its clarity and its colour.
You can take your stone to a local gemologist who can help you establish a value for this diamond.
The value of a diamond depends on its cut, its clarity, its colour and its carat weight. A local jeweler can give you the answer you want.
Diamond worth depends on a number of factors such as cut clarity and colour. Only seeing the diamond would allow valuation.
Carat is the measurement of a diamond's weight. The stone's value would partially depend on its carat weight.
A Diamond can be broken if shot. An impact can break or chip a diamond regaurdless of how perfect the stone is. A diamond cannot be scratched however except by another Diamond. _______________ However, because of its value, you might not want to use a diamond for target practice. Instead, you could consider using a pea or a kernel of corn -- a diamond of either size would be quite valuable: up to tens of thousands of dollars if it were a 'perfect' stone.
Everything about a diamond is unique and individual. Every diamond is valued by its cut, clarity, carat weight and colour. Your answer would depend on the individual stone.
In perfect uncirculated condition, it would be worth $12. A Very Good condition would be worth $1.
The largest raw diamond found to date is the Cullinan Diamond, and if its cut and polished components were available for sale -- they are not -- you would probably pay the most for this collection.
A 'Paragon' is a exemplary instance of a concept. For example, if someone were to be referred to as a paragon, they would be considered an perfect example of a person. The definition of paragon is essentially something that is perfect or flawless. An example would be a very high quality diamond which would be referred to a paragon diamond. Or a child that is a model of excellence in a classroom could be referred to as a paragon.
The term 'genuine, clean diamond' implies a generalist's description of what a gemologist would term 'natural, acceptably flawed diamond'. The term 'regular diamond' is as descriptive as 'regular human'. Any diamond is worth what someone will pay you for it.
Take your stone to a gemologist, who will ascertain its cut, colour, carat weight and clarity. Then take these details to a jeweler, and ask how much s/he would want for a stone of that quality.
A melee diamond is worth what ever someone will pay you for it. Without endorsement, you can review the site prices, below, to determine how much you would pay if you wanted to buy one or more.
In perfect uncirculated condition it would be worth $5.