Spectroscope | Gem

: These use a series of prisms to refract light.

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

: The red end is often compressed while the blue end is stretched, which can make readings trickier to interpret. Key Identification Indicators : These use a series of prisms to refract light

: Often produce a brighter spectrum, which is helpful for darker or more opaque stones. you generally choose between two technologies

: These use a high-density grating to split light evenly across the spectrum.

When starting out, you generally choose between two technologies, each with its own perks.