GIA Study Guide 2026
Everything you need to pass the GIA exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 GIA Exam Format at a Glance
📚 GIA Topics to Study (29)
✍️ Sample GIA Questions & Answers
1. Which C would most likely affect a diamond’s transparency?
Clarity refers to the presence of inclusions and blemishes within or on the diamond. Significant or numerous inclusions can obstruct the passage of light, making the diamond appear less transparent or even cloudy, thus directly impacting its overall transparency.
2. When comparing two round brilliants of equal carat weight, the diamond with a shallower total depth percentage will typically appear:
A shallower cut spreads the carat weight across a wider diameter, making the diamond appear larger face-up, though it may sacrifice light performance.
3. Which GIA cut grade is the highest achievable for a standard round brilliant diamond?
GIA's highest cut grade is 'Excellent,' which represents the top tier of cut quality for standard round brilliant diamonds.
4. Which cut grade does GIA assign only to round brilliant cut diamonds, NOT to fancy shaped diamonds?
GIA issues an overall cut grade only for standard round brilliant diamonds; fancy shapes receive polish and symmetry grades but not a comprehensive cut grade.
5. What is a SWOT analysis used for?
SWOT analysis evaluates internal strengths/weaknesses and external opportunities/threats, providing a comprehensive framework for strategic planning.
6. Where do most natural diamonds form?
Natural diamonds form deep within the Earth's mantle, approximately 90 to 120 miles (140 to 190 kilometers) below the surface. This process requires extreme conditions of high temperature (over 2,000°F or 1,100°C) and immense pressure, which cause carbon atoms to crystallize into the diamond structure. These diamonds are then brought closer to the surface through deep volcanic eruptions.
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How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- gia.edu — Test delivery, fees, exam format, passing score, retake fee, registration · verified Oct 2026