type IIa diamonds

Since diamonds have been separated into four distinct subtypes: Ia, IIa, Ib, and IIb there has been a misuse and overuse of the term type IIa especially when the Indian mine Golconda is mentioned. It is without a doubt that the Golconda mine has produced some of the finest diamond material in the world however not all diamonds retrieved from the Golconda mine are type IIa.