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4 天前 · GIA鑽石淨度等級：包括以下六個大類和十一個具體等級 ：. 無瑕級（Flawless, FL）:在10倍放大鏡下檢查，鑽石也展現了完美無瑕的品質，不含任何內含物及表面缺陷。. 內部無瑕級（Internally Flawless, IF）:當使用10倍放大鏡觀察時，鑽石內部完全潔淨無瑕，其表面可能 ...
4 天前 · Established in 1931, the Gemological Institute of America (GIA) is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading source of knowledge, standards, and education in gems and jewelry.
3 天前 · When purchasing diamond jewelry, it is always a good idea to make sure that the diamonds come with a grading report. Diamond grading reports are available from a variety of different grading labs such as the Gemological Institute of America (GIA) or American Gem Society (AGS), as we detailed in this article. Having a diamond grading report is great, but it is full of technical information that ...
2 天前 · The GIA Cut Grading System for the standard round brilliant diamond evaluates seven components. The first three, brightness, fire, and scintillation, consider the diamond's overall face-up appearance. The remaining four, weight ratio, durability, polish, and symmetry, assess a diamond's design and craftsmanship.
4 天前 · For 4 carat diamonds, we recommend only considering diamonds with an ideal cut or an excellent grade cut on the GIA scale. Choose a diamond that is G-I on the color scale and VS1 or VS2 on the clarity scale.
4 天前 · If you’re in the market for a 6 carat diamond ring, following certain recommendations on GIA certified grades will ensure you get the best value for your purchase. We advise sticking to Excellent grades for cut on the GIA scale, G to I for color, and VS1 or VS2 for clarity.
2 天前 · A chemically pure and structurally perfect diamond has no hue, like a drop of pure water, and consequently, a higher value. GIA's D-to-Z color-grading system measures the degree of colorlessness by comparing a stone under controlled lighting and precise viewing conditions to masterstones of established color value.
