Diamonds of this size are usually purchased at auction: this is a large diamond. The price will vary according to the four Cs of the stone, its cut, colour, and clarity being considered in addition to its relatively heavy carat weight.
Your answer depends on the quality of the diamond you're buying/ selling.
The most expensive diamond, by definition, is priceless.
Every diamond is valued according to its cut, colour, carat weight and clarity.
Every diamond is worth what someone will pay you for it. A certified gemologist can help you understand your diamond's cut, colour, clarity and carat weight: every diamond is unique in these ways. Then, you'll have a basis upon which to set a price for your diamond.
Every diamond is valued individually according to its cut, carat weight, colour and clarity. A jeweler or gemologist can look at your diamond and give you an estimate, or an appraisal.
Any diamond is worth whatever someone will pay you for it.
Any diamond is worth whatever someone will pay you for it.
100-10000 USD
Any diamond is worth whatever someone will pay you for it. Z4 is not a common notation that describes a gem-quality diamond.
I think you are asking if a natural clean diamond is worth as much as a natural diamond that is Not considered clean? The answer is no. A clean diamond means that it is clear from imperfections. Now this can mean clear to the naked eye, or clear under a microscope. Of course the diamond that is clear under the microscope is much worth more than a diamond that is only clear to the naked eye.
It depends on the cut and the grade of the Diamond.
Your answer depends on the quality of the diamond you're buying/ selling.
A lot
$300m ish
£2
$100 to $42,000
A diamond is worth what it's worth, regardless of where and how it's set in jewelery. A diamond's worth depends on its carat weight, its colour, its cut and its clarity.