Plovdiv is one of several potential plant locations that Appsilon Enterprise is considering, the government agency said in a statement on Monday.
The company is expected to make a decision on the plant's location by the end of this year and begin production by the end of 2024.
The project will create about a hundred jobs upon completion, IBA said.
Appsilon Enterprise is a startup specialising in lab-created diamonds, recreating the natural process of growing single-crystal diamonds. Aside from their application in jewellery, diamonds are also used in chip manufacturing, quantum sensors, optics and detectors for high-tech sectors.
Netherlands-headquartered Appsilon Enterprise has offices in the Dutch city of Delft and Turkey's Istanbul.