Gem Spectroscope -

What you are looking for are —dark vertical lines or fuzzy blocks where light is missing from the rainbow. Best Gemstone Tool (Spectroscope)

: Often produce a brighter spectrum, which is helpful for darker or more opaque stones. gem spectroscope

A gem spectroscope is a handheld tool that breaks light down into its spectral colors, revealing unique absorption patterns—essentially a "fingerprint" for identifying gemstones. By observing which wavelengths are absorbed by the elements within a stone (like iron or chromium), gemologists can distinguish between similar-looking gems, detect certain treatments, and even determine a stone's origin. Choosing Your First Spectroscope What you are looking for are —dark vertical

: The OPL Teaching Spectroscope is a widely recommended, affordable choice for beginners. By observing which wavelengths are absorbed by the

: The red end is often compressed while the blue end is stretched, which can make readings trickier to interpret. Key Identification Indicators

: The "balanced" display makes it easier to see fine lines in the blue and violet ends.