In the 1700s, Lavoisier proved that diamonds are carbon only, by burning one and analysing the gas to show that it was CO2. Therefore the diamond was carbon. Yellow diamonds have a contamination of...
The phrase "diamond accents" in the description of a piece of jewelery generally refers to small diamonds. Often they're so small you'd need a magnifying glass to tell that they actually are there.
There is a famous diamond, described below, that was known as 'The Austrian Diamond' at one time. This diamond was a fancy yellow stone, originally dealt into European Royalty by the same French...