Any well known jewelry stores, you can find the most precious diamonds. Go to well known stores however, some stores are tricky and may sell something that is not the correct value.
A carat of diamonds is worth whatever someone will pay you for the carat.
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.
Carat is the unit of measurement used to measure diamonds, other gemstones and pearls.
Three carat diamonds weigh three carats: that's how 'big' they are.
Diamonds are measured in carats, the bigger the stone the larger the carat. If you had a 2 carat diamond it would be worth thousands. My rings are only 0.25 carat which is small
A carat diamonds size is 3.5mm.
Five one-hundredths of a carat of diamonds weighs 05/100ths of a carat.
Each diamond is valued according to its cut, clarity, carat weight and colour. Five diamonds weighing one carat, collectively weigh one carat.
Ct stands for carat, the "weight" of the diamonds.
"The market value for natural blue diamonds is very high. They are very rare and highly sought. The average price for a one carat blue diamond may be as high as $150,000."
The initials TW stand for total weight. One characteristic of every diamond is its carat weight. When a jeweler mounts several diamonds into jewelery, the jeweler may describe the total carat weight of all the diamonds as TW. A single diamond will always be more valuable based on its carat weight than multiple diamonds of the same total carat weight.
Teaching yourself about diamonds is quite simple. You can visit a local jeweler and ask about the four Cs for diamonds: carat weight, clarity, colour and cut. As well, you can read about them online, as below.