Diamond type
Diamond type is a method of scientifically classifying diamonds by the level and type of their chemical impurities. Diamonds are separated into four types: Type Ia, Type Ib, Type IIa, and Type IIb. The impurities measured are at the atomic level within the crystal lattice of carbon atoms and so, unlike inclusions, require an infrared spectrometer to detect.
Diamond cut
The dominating round brilliant diamonds are not as trendy as they used to be since the market was overcrowded in the last decades of the century Simultaneously, giving a fancy diamond cut as a precious jewel on specific celebrations became a part of tradition. A "Heart cut" diamond has romantic symbolism so it is a common gift for Valentine's Day or wedding anniversary. The "pear-shaped" diamonds look like a drop of water and the shape is suitable for diamond earrings. The most famous shapes are: "Princess, Cushion, Heart, Pear, Marquise, Radiant, Asscher cut, Emerald, Oval."