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.
Jacob &amp; Co
Jacob & Co. is also known for its fine jewelry collections, offering unique designs in a variety of styles, including a range of engagement rings and wedding bands for both men and women. The company also designs custom wedding rings, allowing customers to choose diamonds of any shape, size or color. Jacob & Co claims to use the "world's finest and most exclusive gems" for its jewelry such as the pure, colorless Golconda diamonds of India, and rare colored stones from Africa and Brazil. The company purchases diamonds only from countries that are full participants in the Kimberley Process Certification Scheme (KPCS), an international monitoring system created to stem the flow of conflict diamonds, and all diamonds come with Gemological Institute of America authenticity reports.