Binocular surgeon's-type magnifier, clips to spectacles Select size: magnification - working distance (WD):3.5X -mag. / 42cm working distance ie it won't tell you

ie it won't tell you what the stone is

Start-up time 5 seconds

With skill

see all the stones with the same refractive index

Magnification: 1

Binocular surgeon's-type magnifier, clips to spectacles Select size: magnification - working distance (WD):3.5X -mag. / 42cm working distance ie it won't tell youSummary These clip to any spectacles, 2. 5X magnification or 3. 5X magnification. Comments This is the type used by dentists and surgeons, exceptionally high quality. Instead of 'simple' lenses, these lenses are, in effect, two very high quality (tiny) telescopes. which means: a combination of magnification with a long working distance (42cm). Sit (or stand) at a comfortable distance from the object No need to get close (3 or 4 inches with a standard