Please contact the Gemological Institute of America, as below, or the European Gemological Laboratory, also below -- whichever is most convenient for you -- to get the answer you seek.
A genuine diamond can be natural or lab-created. A certified gemologist can help you identify the source of your diamond, and whether the diamond is indeed a diamond.
A genuine diamond is a natural stone that has been mined, graded, cut and polished, which results in its becoming a gemstone.
Natural and Genuine are two different things. To find natural black diamond beads is almost impossible as 99% of all black diamonds have been treated for color and that's how they are sold, even at high-end retailers. What you need look out for is a genuine black diamond beads company who is selling diamond and not another look-alike stone such as spinel or hematite. I searched on Google for a good source and it looks like beacab.com may be a genuine supplier. You can also ask them about natural black diamond beads and whether they have any - from their website they have used the word "genuine" but not natural. Good Luck!
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.
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.
Every natural diamond is the most natural diamond.
Your question is based in semantics, the key word being 'genuine'. A genuine diamond means an authentic diamond. Even mankind can manufacture an authentic diamond, given the carbon materials, heat, pressure and time. Gem quality diamonds are evaluated according to the carat weight, colour, clarity and cut. Colour and clarity can be 'adjusted' by mankind, which lowers the value of an authentic diamond. A natural diamond formed deep within the earth's mantle, erupted to the earth's surface in a volcanic pipe, mined, brokered, cut and polished as a gemstone, that has not been adjusted or enhanced, is worth more than a diamond that has been altered or manufactured by mankind.
The best way I know of is to get your diamond ring apprais3ed by a licensed jeweler who'll be able to tell you if the diamond is real or not. There's really no other way of knowing for sure since., nowadays, synthetic diamonds are made to appear really similar to natural diamonds, and there's no way of knowing if the diamond is genuine or not just by looking at it. Consult your local jeweler and see if he can appraise the diamond for you.
A natural diamond is one that is mined from the earth. One that is grown in a laboratory would not be a natural diamond.
A natural diamond is more rare than a manufactured diamond.
Any natural diamond is 100 percent natural diamond.
The term 'black diamond' can be applied to coal, meaning the monetary value of this natural resource is genuine and real. However, in the world of gem stones, there is a black diamond -- properly Carbanado -- which is a diamond that is black and more porous than diamonds of other colours.