What is the most common or most plentiful diamond?
Please say the name.
The most common or most plentiful diamond is gem diamond. Most of diamond jewels are made from gem stone diamonds. They are shiny and attractive. For more information, visit http://www.thediamondbuyingguide.com/diamondshapes.html.
Actually, all diamonds are considered semi-precious. Diamonds are not rare but the diamond companies (deBeers is the biggest) control the output of diamonds and therefore control the supply, increasing demand.