Education
Girdle Thickness (5.31)
The girdle thickness is judged between the upper and lower halves since this is where the girdle is at its thinnest.
Girdle Thickness (5.31)
The girdle thickness is judged between the upper and lower halves since this is where the girdle is at its thinnest.
The Star Facets (5.41)
The star facets allow a further multitude of light path directions, creating more brilliance.
The Star Facets (5.41)
The star facets allow a further multitude of light path directions, creating more brilliance.
Cutting the Upper and Lower Halves (5.40)
The upper and lower halves are dug out of the girdle of the diamond in the cutting process.
Cutting the Upper and Lower Halves (5.40)
The upper and lower halves are dug out of the girdle of the diamond in the cutting process.
Lens Curvature (6.04)
Lens Curvature (6.04)Due to the curvature of the objective lens in a magnifier, the focal plane is not uniform. Good focus only occurs in the center of the magnified area....
Lens Curvature (6.04)
Lens Curvature (6.04)Due to the curvature of the objective lens in a magnifier, the focal plane is not uniform. Good focus only occurs in the center of the magnified area....
GIA Clarity Grading System (6.09)
GIA’s will be the exclusive grading system that we will learn and put to use, but it is important to be familiar with the language and terms of the others...
GIA Clarity Grading System (6.09)
GIA’s will be the exclusive grading system that we will learn and put to use, but it is important to be familiar with the language and terms of the others...
Clarity Grading (6.06)
Clarity Grading (6.06)Like color, clarity grading takes much practice and can be very deceiving if the grader is not careful and doesn’t take the time needed to examine the stone...
Clarity Grading (6.06)
Clarity Grading (6.06)Like color, clarity grading takes much practice and can be very deceiving if the grader is not careful and doesn’t take the time needed to examine the stone...