(1) The CVD technology is advanced, the purity is high but the color is poor, so it is used in the high-tech field: Large particle size: At present, all bare diamonds above 1.5ct are produced by CVD technology; Color difference: In order to increase production capacity, manufacturers will add nitrogen to accelerate the growth of …
1. Grading based on crystal morphology and location of flaws Generally divided into the positive crystal, distorted crystal, triangular flake, contact twin crystal, and aggregate form. Among them, the business is divided into: Stones: Refers to high-quality diamonds over 1 carat. Fancy Colours: The color of these diamonds does not include colorless with blue or …
Zircon and Moissanite, this is how some people understand man-made diamonds. They are man-made, but not cultivated diamonds. Just like the three concepts of meat, artificial meat, and vegetarian meat, it can always cause a lot of misunderstandings. Meat is real meat, and artificial meat is also real meat, just real meat grown in the …
Generally speaking, the diamond pictured above, also known as diamond, has the mineral name diamond. Its chemical composition is carbon, the only single element in the gemstone, which belongs to the equiaxed crystal system. (1) Seven basic modes The crystal structure of diamonds is very complex, but there are three main types: (1) tetrahedron, (2) …
In the popular science articles on diamond grading, as far as diamonds are concerned, my suggestion is to buy no less than H color. The h color is the watershed color of the diamond color that looks yellow to the naked eye. So what about I-color diamonds that look yellow to the naked eye? On …
Does diamond I color directly look yellow to the naked eye? Read More »
For diamond cutting, the retention rate of raw uncut diamonds is more called "yield rate", which is easy to understand. Roughly the ratio of "cut rough diamond weight" to "rough diamond". I read an article that said olive and heart cuts are low-yield cuts, which is a big misunderstanding and fallacy. The yield of each …
