Your answer depends on the value of the individual diamonds set in the metal of the jewelery. A local jeweler may be able to give you an estimate of its worth.
Every diamond is worth what someone will pay you for it. You can buy a 25 point diamond -- 25/100ths of a carat -- today at Blue Nile and spend about US$215. A four-point diamond is 4/100ths of a carat, meaning that it is very small for a diamond -- between 2 and 2.5MM at the girdle if the diamond is a round brilliant cut.
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.
£2
$300m ish
A lot
$100 to $42,000