Education
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...
Gem-scope (6.05)
Gem-scope (6.05)If you are doing moderate to heavy diamond trading, a gem-scope should be a serious consideration. The binocular microscope, versus the monocular, offers three dimensional (stereoscopic) viewing to allow...
Gem-scope (6.05)
Gem-scope (6.05)If you are doing moderate to heavy diamond trading, a gem-scope should be a serious consideration. The binocular microscope, versus the monocular, offers three dimensional (stereoscopic) viewing to allow...