|
- Natural Diamonds | Diamond Stone – GIA C
Get to know all you need about diamond – the history, facts, quality factors, treatments, imitations and much more here at GIA
- Diamond Description
Diamond is the only gem made of a single element: It is typically about 99 95 percent carbon The other 0 05 percent can include one or more trace elements, which are atoms that aren’t part of the diamond’s essential chemistry Some trace elements can influence its color or crystal shape
- Diamond History and Lore
The story of the modern diamond market really begins on the African continent, with the 1866 discovery of diamonds in Kimberley, South Africa Entrepreneur Cecil Rhodes established De Beers Consolidated Mines Limited 22 years later, in 1888
- Home | GIA 4Cs
For nearly 100 years, GIA has helped advance the global diamond industry through innovation and education A GIA Diamond Grading Report is more than the standard in diamond evaluation—it is the internationally trusted source for diamond quality reporting by jewelers, museums and auction houses
- Diamond Quality Factors
A well-cut diamond displays the beauty consumers expect to see in a diamond A beautiful diamond looks the way it does because of three optical effects: white light reflections called brightness, flashes of color called fire, and areas of light and dark called scintillation
- Gemological Institute Of America | All About Gemstones - GIA
A Study of the Winston Red: The Smithsonian’s New Fancy Red Diamond Presents the first scientific and historical study conducted on the 2 33 ct Winston Red, the fifth-largest known Fancy red diamond in existence Read More
- 天然钻石 | 钻石 - GIA
钻石只在地球表面之下大约 100 英里的高温和高压条件下形成。 钻石的碳原子在所有方向上的键合都基本相同。 另一种矿物 - 石墨，同样也仅包含碳，但其形成过程和晶体结构却大不相同。 石墨十分柔软，您可以用它写字，而钻石则十分坚硬，两块钻石相刻仅仅产生刮痕。 钻石描述 钻石的历史与
- GIA Diamond Origin
GIA’s Diamond Origin tells the story of how diamonds mined from these countries support jobs, education, and health care and in many cases, how they help protect the environment in and around local mining communities
|
|
|