Ade Advanced Optics Pocket Diffraction Grating Gemological Spectroscope sold2026 And the contact type is

And the contact type is 1NO

Supplied as 2 pieces with matching screws

Material: Made of high quality PCB material

which are easy to measure depth

the zippers pull smoothly good closure of pulling teeth

Ade Advanced Optics Pocket Diffraction Grating Gemological Spectroscope sold2026 And the contact type isAde Advanced Optics Pocket Diffraction Grating Gemological Spectroscope When white light travels though a stone, one or more of wavelengths that produce color are absorbed Product Features Compact, pocket size makes it great for traveling with fixed slit & fixed focus. Length: 2. 2 inch Bring it with you on buying trips, vacations, or to trade shows When white light travels though a stone, one or more of wavelengths that produce color are absorbed