---
title: "Raman spectroscopy: meaning in gemology"
description: "Raman spectroscopy is a laboratory method that identifies a material from how it scatters laser light. Diamond shows a peak at 1332 cm⁻¹."
url: https://digitalgemology.com/learn/glossary/raman-spectroscopy
image: https://digitalgemology.com/img/og-digital-gemology.png?v=d224fb01
---

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[Glossary](https://digitalgemology.com/learn/glossary) · Gem testing

# Raman spectroscopy

Also called Raman

Raman spectroscopy is a laboratory method that identifies a material from how it scatters laser light. Diamond shows a peak at 1332 cm⁻¹.

## In more detail

Moissanite's Raman spectrum lacks that peak. With infrared spectra and X-ray fluorescence, which finds silicon, it identifies moissanite submitted as diamond.

## Related terms

- [Screening device](https://digitalgemology.com/learn/glossary/screening-device): A screening device separates natural diamonds from laboratory-grown diamonds and simulants. Most answer Pass (natural) or Refer (send to a laboratory).
- [Absorption spectrum](https://digitalgemology.com/learn/glossary/absorption-spectrum): An absorption spectrum shows which wavelengths of light a stone absorbs. In a spectroscope, the absorbed parts of the spectrum look dark.

## Learn more

- [Diamond testers and moissanite: what the instruments say](https://digitalgemology.com/learn/diamond-vs-moissanite/diamond-tester-and-moissanite)

[All 328 terms](https://digitalgemology.com/learn/glossary)