110 mm x 150 mm stage has a 75 mm stage plate. Wide 9 lbs. in weight. A microscopes is one of the gemologists most useful tools. If you can afford the best, then you should certainly consider it.
Microscopes have two general purposes.
If you go into a jewelry store you will usually find a high end scope on a counter where customers can use it. Showing a customer a diamond under magnification is one of the best sales tools a jeweler has. For this purpose, you need a microscope whose appearance will impress the customer, as well as one that is easy for an inexperienced person to use. The other major uses of a microscope are in gem identification and grading. For these purposes a top end microscope isn't necessary.