Spectroscope Magnifier Style_Loupe or eyeglass - it is still 'lit'

- it is still 'lit' for another   hours but too dim to be of use

Lens type: Triplet (one magnifier made of three lenses on top of each other)

for gemstones

Switchable to grams (g)

Spectroscope Magnifier Style_Loupe or eyeglass - it is still 'lit'Summary Spectroscope (diffraction grating type), 50mm long X 12mm dia. You view the light from coloured stones, you see a spectrum of colour (rainbow) interrupted with black (or white) lines*. You don't take any measurements (this is not a spectrometer), you just have to recognise the patterns of lines (see the example in the picture). If you don't have any gemstones to hand, here's some fun things to do with a spectroscope. Point it at the sky and