: The "balanced" display makes it easier to see fine lines in the blue and violet ends.
: Often produce a brighter spectrum, which is helpful for darker or more opaque stones. gem spectroscope
: The OPL Teaching Spectroscope is a widely recommended, affordable choice for beginners. : The "balanced" display makes it easier to
: These use a series of prisms to refract light. gem spectroscope
: These use a high-density grating to split light evenly across the spectrum.
: The red end is often compressed while the blue end is stretched, which can make readings trickier to interpret. Key Identification Indicators