CDG Technology & Digital Tools 3

Question 1

Raman spectroscopy is preferred over FTIR for confirming a stone is diamond because it specifically identifies:

Accepted Answer

The characteristic 1332 cm⁻¹ Raman peak unique to diamond's carbon lattice

Answer

Diamond produces a sharp, distinctive Raman peak at 1332 cm⁻¹ that conclusively confirms its carbon sp³ bonding structure.

Question 2

When a grading lab's digital imaging system uses 'macro photography with cross-polarized light,' the primary goal is to:

Accepted Answer

Reveal internal stress, strain, and growth features without surface glare

Answer

Cross-polarized light suppresses surface reflections, allowing strain and internal features to be imaged more clearly.

Question 3

A diamond's laser inscription is best verified using which tool available at the point of sale?

Accepted Answer

A 10× loupe or microscope focused on the girdle while matching the number to a grading report

Answer

Laser inscriptions are etched on the girdle and must be read under magnification and matched exactly to the report number.

Question 4

Which measurement does Sarine's Advisor system specifically provide that helps customers understand a diamond's light performance?

Accepted Answer

A Light Performance score based on fire, brilliance, and sparkle metrics

Answer

Sarine Advisor generates a Light Performance report measuring brilliance, fire, and sparkle through ray-tracing simulation.

Question 5

In a computerized inclusion mapping system, what does the term 'cloud' render as on a digital plot?

Accepted Answer

Multiple tiny dots grouped to represent a hazy cluster of pinpoints

Answer

A cloud is plotted as a cluster of small dots because it consists of numerous minute inclusions too small to plot individually.

(CDG) Certified Diamond Grader Practice Test