Education

GIA Color Grading Scale (7.09)

GIA Color Grading Scale (7.09)Just as for carat weight, a standard of grading color became accepted throughout much of the world. The system this course recommends and teaches is the...

GIA Color Grading Scale (7.09)

GIA Color Grading Scale (7.09)Just as for carat weight, a standard of grading color became accepted throughout much of the world. The system this course recommends and teaches is the...

Early Diamond History (1.01)

Origin of the word diamond. It was believed diamond could not be damaged. Large diamonds were worn as badges of rank. It is thought that the first diamonds were found in India...

Early Diamond History (1.01)

Origin of the word diamond. It was believed diamond could not be damaged. Large diamonds were worn as badges of rank. It is thought that the first diamonds were found in India...

Section 2: Diamond Location and Mining

Locating diamond bearing sites comes before mining the sites. This could come from primary deposits in kimberlite or lamproite pipes or secondary deposits such as alluvial. Technology also plays a...

Section 2: Diamond Location and Mining

Locating diamond bearing sites comes before mining the sites. This could come from primary deposits in kimberlite or lamproite pipes or secondary deposits such as alluvial. Technology also plays a...

Designing the Modern Cut Diamond 5.03

Designing the Modern Cut Diamond 5.03

Why diamond's refractive index is so important.

Designing the Modern Cut Diamond 5.03

Why diamond's refractive index is so important.

CARAT WEIGHT: Carat Weight Measurement 4.01

CARAT WEIGHT: Carat Weight Measurement 4.01

Carat weight is a weight measurement used for diamonds (and most other gemstones), which resides in the metric system, whereas that 5.00 carats is 1.00 gram. 1.00 carat would be...

CARAT WEIGHT: Carat Weight Measurement 4.01

Carat weight is a weight measurement used for diamonds (and most other gemstones), which resides in the metric system, whereas that 5.00 carats is 1.00 gram. 1.00 carat would be...

Strong Blue Fluorescence and Color Effect

Even though medium and strong blue fluorescence generally do have a negative effect on diamond value, it may also affect the appearance of the color face-up in a mounting or...

Strong Blue Fluorescence and Color Effect

Even though medium and strong blue fluorescence generally do have a negative effect on diamond value, it may also affect the appearance of the color face-up in a mounting or...