Gem Spectroscope

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Gem Spectroscope

Gemological Instruments

Gemstone identification tools for identifying stones by analyzing their absorption spectra

Gem spectroscopes uses a dispersive element (either a prism or a diffraction grating) to separate white light into different wavelengths, creating a visible light spectrum. Various elements and compounds present in gemstones, such as transition metals, rare earth elements, and radioactive elements, selectively absorb specific wavelengths of light. By analyzing these absorption spectra, gemologists can identify gemstone types, determine their coloring agents, and study the composition of their color properties.

Tabletop Gem Spectroscope, FTS-50

Net weight: 3.78kg
Built-in digital scale: 400-700nm
Packaging: Foam-padded export-grade cardboard box

Handheld Gem Spectroscope, FGS-1

Length: 55mm
Net weight: 20g
Packaging: Outer cardboard box with an inner leather case

Handheld Gem Spectroscope, FGS-1A

Length: 55mm
Net weight: 20g
Packaging: Outer cardboard box with an inner leather case

Handheld Gem Spectroscope, FPS-3

Length: 75mm
Net weight: 36g
Packaging: Outer cardboard box with an inner leather case

Handheld Gem Spectroscope, FPS-3A

Length: 75mm
Net weight: 36g
Packaging: Outer cardboard box with an inner leather case

Electronic Gem Spectroscope, FTS-CCD

Tabletop dual-light source base with button-controlled switching, enabling both transmission and reflection observation modes.

Handheld Spectroscope Stand, FSS-2

A light source and spectroscope can be mounted on the spectroscope stand, to make it easier to observe the absorption spectrum of gemstones.

Methods of use: Suitable for both reflection and transmission methods.
Material: Aluminum.
Dimensions: 90 x 30 x 16 mm.

Reflection method

Transmission method

Applications

Suitable for colored gemstones, as most colorless stones do not display distinct absorption spectra, with exceptions like zircon, diamond, and enstatite.
Used for identifying gemstones with distinctive spectral patterns, including almandine, ruby, sapphire, jadeite, chrysoberyl, sinhalite, zircon, cobalt glass, and synthetic cobalt spinel.
Gemstones with characteristic spectra can serve as diagnostic identification markers. For example, almandine exhibits an iron-aluminum absorption window, natural green jadeite has a 437nm absorption line, and certain gemstones display a series of distinct absorption bands in the red region.

Transmission light method

Internal reflection method

Surface reflection method

Absorption Spectrum

Absorption spectrum of almandine

Absorption spectrum of emerald

Absorption spectrum of ruby

Absorption spectrum of chrysoberyl

Spectral Diagram

A prism spectroscope produces a non-uniform wavelength spectrum

A diffraction grating spectroscope generates a uniform wavelength distribution.

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