Gemmological microscope Type_Approved 5% false negative rate) providing

5% false negative rate) providing the colour is 'clear' (colour D to J) and the size is at least 0

it is just a bit wobbly around the edges

External dimensions 50mm tall X 42mm diameter

After 1 year proof of purchase required and £6

and it can also be different in different directions

Gemmological microscope Type_Approved 5% false negative rate) providingDetails Switchable to 20X or 40X magnification. Built in stone holder to hold the stone at any angle. Flexible lighting system: fixed 45 degree spot (dimmable), 45 degree flatlight, under stage light (dimmable), attachment for dark field illumination (the light 'seeps' in around the edge). Of course, the optical quality is good too, which is what you need for examining inclusions in gemstones. Guarantee: 1 year