A handheld spectroscope for visible light shows the absorption lines of the elements involved in producing its color. It helps to separate ruby (chrome) against red or pink sapphire (iron) to name onl

Features:1) Refractometers are precision optical instruments designed to measurethe concentration or mixture ratio of water soluble2) Easy to use, just place a few drops of juice on the prism glass an

Product Name: Traditional RefractometerPlace of Origin: ChinaFeatures:1) Refractometers are precision optical instruments designed to measurethe concentration or mixture ratio of water soluble2) Easy

Product Name: Ultrasonic CleanerPlace of Origin: ChinaFeatures:1) Stylish design perfect for home use2) First mass-produced desktop ultrasonic cleaning in the market3) Wide-diameter transducer for bes

Features:1) Stylish design perfect for home use2) First mass-produced desktop ultrasonic cleaning in the market3) Wide-diameter transducer for best cleaning result4) Applications: jewelry and watches

Features:1) Gem shortwave/long wave ultraviolet lamp2) Check whether a gemstone fluoresces to long wave orshortwave ultraviolet light3) Power input: 220V 50Hz4) Wavelength: SW 253.7nm5) Wavelength: LW

Product Name: UV LampPlace of Origin: ChinaFeatures:1) Gem shortwave/long wave ultraviolet lamp2) Check whether a gemstone fluoresces to long wave orshortwave ultraviolet light3) Power input: 220V 50H

Features:1) Gem shortwave/long wave ultraviolet lamp2) Check whether a gemstone fluoresces to long wave orshortwave ultraviolet light3) Power input: 220V 50Hz4) Wavelength: SW 253.7nm5) Wavelength: LW

The pocket thickness gauge is designed to measure the thickness of gem stone, leather, builiding material, metal plate and plastic plate etc. It is suited for quick, efficient, repeated measuring and