High cost, limited materials are usually rare.
Given the high number of diamonds limited by the low carat weight in your question, the cost of the diamonds might not be so much a factor as the quality of the setting into which they are mounted. The clarity quality that you describe wouldn't be so visible in diamonds weighing less than a quarter carat (.25 carat) each.
Diamonds always cost more than gravels.
Ancestry.com is only limited to a certain amount of stuff if it is free. Most of the stuff cost money.
we can stop it by makeing diamonds cost less or not buying them
Diamonds.
The cost of rough diamonds depends on size, color, and clarity.
Diamonds cost and weigh on an individual basis.
Today black diamonds are sold for prices that are comparable to those of white diamonds.
I would imagine, a lot of money, considering how big and smart they are. There are also a small limited amount of them, so that would increase the price, too.
At the Crater of Diamonds State Park in Arkansas, you can dig for diamonds. You pay for this experience depending on your age and your access -- if you require it -- to specialized materials that make digging for diamonds more productive. You can read more, below. Otherwise, if you dig for diamonds in geography that you do not own, or do not have permissions to access/ dig through, the cost may be hazardous to your health.
Nixon makes various watches with diamonds in the face. The Nixon Rotolog has over 9.75 carats of diamonds in the face and is extremely famous, but with it comes the cost of having that many diamonds in it.
some cons are that they can cost a lost which makes industries not want to support them and they have a limited amount of space