10. Advanced Analytical Methods in Gem Identification

Welcome to your Module 10 - Advanced Analytical Methods in Gem Identification

1. What is the primary purpose of spectroscopy in gemology?

A. To measure the hardness of gemstones

B. To analyze the light absorbed, emitted, or scattered by a gemstone

C. To determine the weight of gemstones

D. To assess the cut quality of gemstones

2. Which type of spectroscopy uses the scattering of light to provide information about molecular vibrations?

A. Absorption Spectroscopy

B. Emission Spectroscopy

C. Raman Spectroscopy

D. Infrared Spectroscopy

3. What is the primary instrument used in spectroscopy?

A. Microscope

B. Spectrometer

C. Caliper

D. Refractometer

4. How can spectroscopy help in detecting gemstone treatments?

A. By measuring the gemstone's weight

B. By analyzing changes in spectral properties

C. By assessing the gemstone's clarity

D. By determining the gemstone's color grade

5. What does optical spectrometry analyze in gemstones?

A. Hardness and toughness

B. Optical properties such as color and transparency

C. Density and specific gravity

D. Surface texture

6. Which light sources are typically used in optical spectrometry?

A. X-rays and gamma rays

B. UV, visible, and IR light sources

C. Infrared and microwave radiation

D. Gamma rays and neutrons

7. How can optical spectrometry help in detecting gemstone treatments?

A. By measuring the gemstone's weight

B. By analyzing changes in optical properties

C. By assessing the gemstone's clarity

D. By determining the gemstone's color grade

8. What does atomic mass spectrometry (AMS) measure in gemstones?

A. Hardness and toughness

B. Mass to charge ratio of ions

C. Density and specific gravity

D. Surface texture

9. What is the primary application of AMS in gemology?

A. Measuring gemstone weight

B. Determining elemental composition and isotopic ratios

C. Assessing gemstone clarity

D. Evaluating gemstone cut quality

10. How can AMS help in detecting synthetic gemstones?

A. By measuring the gemstone's weight

B. By analyzing differences in elemental or isotopic composition

C. By assessing the gemstone's clarity

D. By determining the gemstone's color grade

11. What does X-ray spectrometry analyze in gemstones?

A. Hardness and toughness

B. Elemental composition

C. Density and specific gravity

D. Surface texture

12. How are elements identified in X-ray spectrometry?

A. By measuring hardness

B. By analyzing characteristic X-ray emissions

C. By assessing color and transparency

D. By determining specific gravity

13. What does Raman spectrometry provide information about in gemstones?

A. Hardness and toughness

B. Molecular structure

C. Density and specific gravity

D. Surface texture

14. What type of scattering is utilized in Raman spectrometry?

A. Elastic scattering

B. Inelastic scattering

C. Absorptive scattering

D. Reflective scattering

15. What does NMR spectrometry study in gemstones?

A. Magnetic properties of atomic nuclei

B. Hardness and toughness

C. Density and specific gravity

D. Surface texture

16. What type of field is used in NMR to align the magnetic moments of nuclei?

A. Electric field

B. Magnetic field

C. Gravitational field

D. Electromagnetic field

17. What does EPMA analyze in gemstones?

A. Hardness and toughness

B. Elemental composition

C. Density and specific gravity

D. Surface texture

18. How are elements detected in EPMA?

A. By measuring hardness

B. By analyzing characteristic X-rays emitted

C. By assessing color and transparency

D. By determining specific gravity

19. What does SEM provide detailed images of in gemstones?

A. Hardness and toughness

B. Surface morphology

C. Density and specific gravity

D. Optical properties

20. What type of beam is used in SEM to produce images?

A. X-ray beam

B. Electron beam

C. Light beam

D. Laser beam

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