Practice Test Geeks(GIA) Certified Diamonds Gemological Institute of America Practice Test
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4Cs of Diamond Quality Flashcards

7 cards from real GIA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 4Cs of Diamond Quality flashcards as text

  1. Which GIA clarity grade describes a diamond with inclusions that are 'obvious under 10x magnification' and may affect transparency or brilliance?

    Answer: I1

    GIA's I1 grade describes diamonds where inclusions are obvious under 10x magnification and may affect transparency or brilliance.

  2. A diamond graded 'G' on the GIA color scale would be described as:

    Answer: Near colorless

    GIA grades D-F as colorless, G-J as near colorless, so a G-color diamond falls in the near colorless range.

  3. What does 'fluorescence' mean in the context of GIA diamond grading?

    Answer: The diamond's visible glow under UV light

    Fluorescence describes a diamond's tendency to emit a soft glow (usually blue) when exposed to ultraviolet light.

  4. When GIA grades 'cut' for round brilliant diamonds, which of the following is NOT one of the three components evaluated?

    Answer: Fluorescence

    GIA's cut grade for rounds evaluates brightness, fire, and scintillation — fluorescence is a separate characteristic.

  5. A diamond with a depth percentage of 58% and a table percentage of 57% would most likely receive which GIA cut grade?

    Answer: Excellent

    A depth near 61% and table near 57% fall within GIA's Excellent cut grade proportions for round brilliants.

  6. What is the GIA term for the weight measurement equal to 200 milligrams?

    Answer: Carat

    One metric carat equals exactly 200 milligrams (0.2 grams), the standard unit for gemstone weight.

  7. Which clarity characteristic is defined as a clarity feature that originates INSIDE the diamond?

    Answer: Inclusion

    GIA defines inclusions as internal clarity characteristics, while blemishes are external surface features.

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  1. gia.edu — Test delivery, fees, exam format, passing score, retake fee, registration · verified Oct 2026