Natural Diamonds | Diamond Stone – GIA C
网页About Diamond. Diamond forms under high temperature and pressure conditions that exist only about 100 miles beneath the earth’s surface. Diamond’s carbon atoms are bonded in essentially the same way in all directions. Another mineral, graphite, also contains only carbon, but its formation process and crystal structure are very different.
Gemological Institute Of America | All About Gemstones - GIA
网页Established in 1931, GIA is an independent nonprofit that protects the gem and jewelry buying public through research, education and laboratory services.
My GIA
网页My Laboratory & GIA Laboratory Client Portal. Now featuring one log in for My Laboratory and the GIA Client Portal. Maintain your laboratory account information and grading results online. You can manage your team members and provide access to My Laboratory, update payment preferences, view open balances and create shipping memos.Also, view and …
GIA - Report Check
网页GIA reports represent the highest standard of reliability, consistency and integrity. And now, GIA Report Check is available for all GIA reports, providing you with an additional level of assurance. With Report Check, you can quickly and conveniently confirm that the information on your report matches what is archived in the GIA report database.
GIA - Report Check
网页<link rel="stylesheet" href="https://use.typekit.net/aoe4wgi.css"/><link rel="stylesheet" href="https://use.typekit.net/heg5qxh.css"/> <iframe src="https://www ...
Diamond Description
网页Diamond’s characteristic chemical composition and crystal structure make it a unique member of the mineral kingdom. 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.
Is There a Difference Between Natural and Laboratory-Grown …
网页2019年5月31日 · One, however, is a billion or more years old and the other was recently grown in a laboratory. Both are diamonds, of course. The first is a natural diamond created by forces deep within the young Earth. The second is from a laboratory and possesses essentially the same chemical, physical and optical properties as its natural counterpart.
GIA Education Story
网页GIA Education Story. Founded by a jeweler who identified a need to professionalize the industry, GIA is a nonprofit institution committed to protecting and educating the public in the field of gems and jewelry. Since 1931, GIA created standards used in gemstone evaluation around the world by creating the 4Cs of Diamond Quality and the GIA 7 ...
GIA - Report Check
网页Verify the authenticity and quality of your diamond or gemstone with GIA report check, a free and secure online service from the world's leading gemological authority.
Natural Diamonds | Diamond Stone – GIA C
网页GIA has been grading laboratory-grown diamonds since 2007. Beginning July 1, 2019, GIA Laboratory-Grown Diamond Reports and identification reports no longer use the term “synthetic.”. The GIA Laboratory-Grown Diamond Report includes the standard GIA color, clarity and cut grading scales for reference purposes.