What it does for you: 
Lenscope Magnifier by Bausch & Lomb provides a clear, 
		illuminated, distortion-free, 
  color corrected image and can be used for a virtually any kind of close 
  inspection or measurement application, including gem grading.  
		
		
Lenses: The 
Lenscope Magnifier offers a choice 
  of interchangeable 
Hastings Triplet  glass lenses (7X or 10X).  The lens is 
  19.8 mm in diameter.  (One such lens comes with the Lenscope, and you may 
  order the other lens separately below.)
		
		
Illumination: The 
Lenscope Magnifier features two angled illumination lamps (45 degrees and 90 
  degrees from the viewing angle) and a zippered storage case.  Requires two AA 
  batteries (not included).  
Measuring scales 
		(pictured above but not included) are also available as an add-on for the Lenscope.