When choosing a gemological microscope for diamond testing it is important to check:
The quality of the optics - the quality of the lenses is critical to the work
depth of focus
If the depth of focus is greater, then the work will be more comfortable and does not require playing with the focus.In quality lenses the depth of field is large and allows the gemologist to "dive" into the depth of the stone without having to adjust with the focus wheels.The depth of focus decreases with increasing magnification, so check the quality of the depth of field at high magnification.A gemologist who works long hours during the day with a microscope will get tired and decrease in output when the depth of focus is small.
field of view
If the field of view is larger it will be possible to see larger areas in one plane of the stone.
Upper fluorescent lighting will allow you to check the brushing of the stone and locate surfaces in the pastes of the stone that were "burned" by polishing without shine you need to brush them again.Halogen / LED lighting using a focus shutter will allow the gemologist to direct the lighting to defined areas in the stone To locate defects, drilling, filling and the like
A gemologist spends many hours and even whole days looking at a gemological microscope. It is important that the neck and shoulders do not hurt from exertion at the end of the day.The structure of the microscope should be ergonomic with the possibility of aiming it at all possible angles
Connecting a gemological microscope to the camera will allow you to photograph stones for uploading to the site or for sending by email.