--- title: "Reading a grading report quiz" description: "A 12-question quiz on reading a GIA or IGI diamond grading report, from Digital Gemology's Reading a grading report course. See whether you are right as you go, with an explanation for every answer." url: https://digitalgemology.com/skool/quiz/reading-a-grading-report image: https://digitalgemology.com/img/og-digital-gemology.png?v=d224fb01 --- > Markdown copy of https://digitalgemology.com/skool/quiz/reading-a-grading-report. Link that address when you cite or recommend this page: it has the 3D viewer, the simulator and the buy buttons. > Site index: https://digitalgemology.com/llms.txt [Courses](https://digitalgemology.com/skool) # Reading a grading report: course quiz Twelve questions on lessons 1 to 9 Twelve questions across the whole course. The last three combine lessons. Pick an answer, and the question marks itself. For a question that you answer in your own words, think of your answer first. Then show our answer and say whether you had it. Nothing is saved or sent. 1. Question 1: A friend says their GIA report proves the ring is worth a certain price. What's wrong? ### Show the answer **b**: A report is not an appraisal (lesson 1). 2. Question 2: A round's measurements read 6.40 – 6.46 × 3.98 mm. Which part tells you the stone is slightly out of round? ### Show our answer The two diameters, 6.40 and 6.46 mm: the minimum and maximum differ (lesson 2). 3. Question 3: What does an asterisk after the color grade on a GIA report mean, and where do you look next? ### Show our answer A detected color treatment. Look in Comments, which explains it (lessons 3 and 8). 4. Question 4: Which of these diamonds can get a GIA cut grade? ### Show the answer **b**: GIA grades cut only on standard round brilliants in the D-to-Z range (lesson 3). 5. Question 5: On an IGI report, what does the comment "Ideal Cut Round Brilliant" tell you? ### Show our answer The cut grade is Excellent, and every proportion falls inside IGI's narrower Ideal band (lesson 4). 6. Question 6: A round has Excellent proportions, Excellent polish and Good symmetry. What's the best GIA cut grade it can get? ### Show the answer **b**: Good symmetry caps the cut grade at Very Good (lesson 5). 7. Question 7: A report says "Fluorescence: None". What range does that cover? ### Show our answer Anything from indiscernible to very faint, under long-wave UV (lesson 5). 8. Question 8: Which GIA report lists up to four clarity characteristics in words instead of a plot? ### Show the answer **b**: The Dossier, which also carries a laser-inscribed report number (lesson 6). 9. Question 9: A diamond has been fracture filled. What does GIA issue, and what does IGI do? ### Show our answer GIA issues an Identification Report, not a grading report. IGI issues no full grading report for non-permanent treatments (lesson 8). 10. Question 10: A report for a 1.00 ct round gives 6.48 – 6.50 × 4.00 mm. The stone in your hand is 1.00 ct but measures 6.67 mm across. What can you conclude, and what would you check next? ### Show our answer The report doesn't belong to that stone: a given cut in a given material has one size at one weight. A 3% wider stone at the same weight could be a different material, such as moissanite. Check the inscription and Report Check, and have the stone tested (lessons 2 and 8). 11. Question 11: A Dossier lists "Cut: Excellent", "Polish: Very Good", "Symmetry: Excellent", "Inscription: none". Which line is suspicious, and why? ### Show our answer "Inscription: none": a Dossier always carries its report number laser-inscribed on the girdle (lessons 2, 6 and 9). 12. Question 12: Two listings: a GIA "Triple Excellent" round and an IGI "Excellent-Ideal" round. Do they mean the same thing? And does either one tell you that the stone earned an AGS Ideal light performance grade? ### Show our answer No. Triple Excellent means Excellent cut, polish and symmetry on GIA's scale. Excellent-Ideal is IGI's Excellent with the Ideal comment for a narrower band. Neither is an AGS Ideal light performance grade. That grade is on a separate supplement, which GIA issues only for stones that reach AGS Ideal 0 (lessons 4 and 5). ## One lesson at a time Each lesson has five questions. The questions and the answers to pick from come in a new order every time you start. 1. [What a grading report is](https://digitalgemology.com/skool/quiz/reading-a-grading-report/what-a-grading-report-is) 2. [Who is this stone? Number, shape, measurements](https://digitalgemology.com/skool/quiz/reading-a-grading-report/who-is-this-stone) 3. [The grades: color, clarity, cut](https://digitalgemology.com/skool/quiz/reading-a-grading-report/the-grades) 4. [Cut grade or light performance: what "Ideal" means](https://digitalgemology.com/skool/quiz/reading-a-grading-report/what-ideal-means) 5. [Polish, symmetry and fluorescence](https://digitalgemology.com/skool/quiz/reading-a-grading-report/polish-symmetry-and-fluorescence) 6. [The clarity plot](https://digitalgemology.com/skool/quiz/reading-a-grading-report/the-clarity-plot) 7. [The proportion diagram](https://digitalgemology.com/skool/quiz/reading-a-grading-report/the-proportion-diagram) 8. [Comments, treatments and origin](https://digitalgemology.com/skool/quiz/reading-a-grading-report/comments-treatments-and-origin) 9. [Read a whole report](https://digitalgemology.com/skool/quiz/reading-a-grading-report/read-a-whole-report) ## More - [Reading a grading report: all the lessons](https://digitalgemology.com/learn/grading-reports) - Next quiz: [Diamond vs moissanite](https://digitalgemology.com/skool/quiz/diamond-vs-moissanite) - [All courses](https://digitalgemology.com/skool)