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The 4C’s Diamond Quiz


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The 4Cs Diamond Quiz

Think you know the 4 C’s?

Think you understand all about the Grades and Ranges? Want to Test that Knowledge?

This Quiz is all about the 4 C’s of Diamonds. If you’ve been reading my Posts and Articles, you’ll know that I talk a lot about the 4 C’s. Have you been paying attention?

Take the Test

Grab a Pencil and some Scrap Paper. There are 50 Questions in all.

Some of the Questions are Multiple-Choice, True and False and a few are Fill-Ins, but they are all Fun! (If you Consider taking a Quiz Fun!)

Write Down your Answers

At the End of the Test you’ll be able to Score yourself and see the Answers and Grades.

BEWARE… Some of these are Tricky!

:) Ready? Let’s begin…

The 4 C’s Diamond Quiz!

Question 1:

Who devised the 4 C’s?

  1. AGS
  2. IGI
  3. GIA
  4. EGL

Question 2:

What type of Magnification is used to Grade Diamonds?

  1. 5X
  2. 10X
  3. 20X
  4. 30X

Question 3:

S-Z Color is called what?

  1. Tinted Color
  2. Fancy Color
  3. Faint Yellow
  4. Light Yellow

Question 4:

What Color Grade is Colorless?

  1. A
  2. B
  3. C
  4. D

Question 5:

A Flaw on the outside of a Diamond is called what?

  1. Blemish
  2. Inclusion
  3. Crystal
  4. Feather

Question 6:

Trigons usually show up where?

  1. Culet
  2. Naturals
  3. Crown
  4. Pavilion

Question 7:

A Fisheye is caused by what?

  1. A Shallow Stone
  2. A Stone with Wavy Grainlines
  3. Dark Inclusions that Resemble a Fish
  4. A Rough Unpolished Girdle

Question 8:

What Year were the 4C’s devised?

  1. 1919
  2. 1962
  3. 1949
  4. 1936

Question 9:

The 4 C’s are:

  1. Color, Clarity, Shape, Size
  2. Cut, Color, Clarity, Carat Weight
  3. Clarity, Colorless, Cutting Style, Weight
  4. Carat Weight, Color, Cost, Clarity

Question 10:

Star Facets appear on the:

  1. Pavilion
  2. Table
  3. Girdle
  4. Crown

Question 10:

The Culet is what Shape?


Question 12:

Fancy Cuts are what?

  1. Diamonds with Fancy Color
  2. Diamonds with Extra Facets
  3. Every Cut except the Brilliant Cut
  4. Trigons with Triangular Patterns

Question 13:

How many Facets are on a Brilliant Cut?

  1. 50
  2. 53
  3. 55
  4. 58

Question 14:

What is a great indicator as to the Make of a Diamond?

  1. Girdle Thickness
  2. Table Shape
  3. Width of Diamond
  4. Culet Shape

Question 15:

What is the Ideal Table Percentage?

  1. 54-59%
  2. 52-60%
  3. 50-55%
  4. 53-57%

Question 16:

What is Scintillation?

  1. Sparkle Effects
  2. Fire in a Diamond
  3. Fluorescence
  4. After Glow

Question 17:

What gets the title of “Flat-Tire”?

  1. Girdle
  2. Culet
  3. Facets
  4. Table

Question 18:

What can make a Diamond look like it has a Bullet Hole?

  1. Cavity
  2. Pavilion
  3. Blemish
  4. Culet

Question 19:

What is Z+ ?


Question 20:

How many different Color Grades are there?

  1. 23
  2. 24
  3. 25
  4. 26

Question 21:

What is the lowest Color Range there is?

  1. D
  2. G
  3. S
  4. Z

Question 22:

The Hope Diamond is what Color?

  1. White
  2. Blue
  3. Green
  4. Red

Question 23:

Clarity is what?

  1. Amount of Imperfections in a Diamond
  2. Amount of Carbon Spots in a Diamond
  3. Amount of Blemishes in a Diamond
  4. Amount of Cloudiness in a Diamond

Question 24:

Which one is NOT an Imperfection?

  1. Naturals
  2. Cleavage
  3. Knots
  4. Warping

Question 25:

What is the #1 Imperfection found in Diamonds?

  1. Bearded Girdle
  2. Black Carbon Spots
  3. Clouds
  4. Naturals

Question 26:

What Jewelry often has a Bearded Girdle?

  1. Tension Set Jewelry
  2. Estate Jewelry
  3. Cubic Zirconia Jewelry
  4. Bezel Set Jewelry

Question 27:

Laser Drill Holes are made to what?

  1. Remove Fluorescence
  2. Burn out Inclusions
  3. Remove Inscriptions
  4. Enhance Facet Lines

Question 28:

Extra Facets usually…

  1. Get Rid of Unsightly Inclusions
  2. Round off the Crown
  3. Add Weight to the Carat Size
  4. Create the Ideal Cut

Question 29:

What can look like an Inverted Pyramid?

  1. Culet
  2. Grain Lines
  3. Trigons
  4. Facets

Question 30:

How many Clarity Grades are there?

  1. 5
  2. 7
  3. 9
  4. 11

Question 31:

I4 Clarity Diamonds are known as Industrial Diamonds?

  1. TRUE
  2. FALSE

Question 32:

VVS Stands for:

  1. Very, Very, Slightly Included
  2. Very, Very, Small Inclusion
  3. Very, Very, Slight Internal Flaws
  4. Very, Very Select Imperfections

Question 33:

What Percentage of Diamonds in Jewelry Stores are I Clarity?

  1. 20%
  2. 30%
  3. 40%
  4. 50%

Question 34:

Diamond Carat Weights all started with what?

  1. Carob Seeds
  2. Facet Size
  3. Girdle Width
  4. Specific Gravity

Question 35:

CTW means what?

  1. Carat to Weight
  2. Carat Weight
  3. Carat Total Weight
  4. Carat Total Whole

Question 36:

What is the best selling Carat Weight sold for Engagement Rings?

  1. .38
  2. .50
  3. .75
  4. 1.00

Question 37:

The 4C’s help what?

  1. Help locate the Origin of a Diamond
  2. Help Identify SI3 Clarity Diamonds
  3. Help Determine the Density of a Diamond
  4. Help Identify, Classify and Price Diamonds

Question 38:

Diamonds K-Z can have what Colors?

  1. Yellow & Brown
  2. Yellow & White
  3. Yellow & Blue
  4. Yellow & Colorless

Question 39:

What Color is in the Very Light Yellow Color Range?

  1. M
  2. R
  3. S
  4. Y

Question 40:

What’s the highest Color Grade any Diamond can get?


Question 41:

What’s the rarest Diamond Color there is?

  1. Yellow
  2. Pink
  3. Blue
  4. Green

Question 42:

Champagne Colored Diamonds are what Color?

  1. Light Yellow
  2. Light Brown
  3. Light Orange
  4. Light Peach

Question 43:

Most Mineral Crystals found in Diamonds are what?

  1. Abrasions
  2. Garnet Crystals
  3. Diamond Crystals
  4. Grain Lines

Question 44:

What is the DNA of Diamonds?

  1. Graphite
  2. Sulphur
  3. Corundum
  4. Carbon

Question 45:

The initials GIA stand for?

  1. Gemological Institute of America
  2. Gem Lab Association
  3. Gemstone Identification Association
  4. Gemstone Institute Association

Question 46:

What can look like Jagged Mountains on a Diamond?

  1. An Uneven Girdle
  2. A Rough Cavity Spot
  3. Star Facets
  4. Pavilion Facets

Question 47:

Most Diamonds are found to have what Color?

  1. Yellow
  2. White
  3. Brown
  4. Gray

Question 48:

How many Points are in a One Carat Diamond?


Question 49:

Trilliant Cuts are what Shape?

  1. Triangle
  2. Trapezoid
  3. Pentagon
  4. Octagon

Question 50:

What takes up the most amount of Information on a Diamond Report?

  1. Clarity
  2. Color
  3. Carat Weight
  4. Cut

51: Extra Credit worth 2 pts

The Ideal Cut usually refers to what Cut?

  1. Princess Cut
  2. Brilliant Cut
  3. Perfect Cut
  4. Fancy Cut

52: Extra Credit worth 2 pts

Table Percentage is arrived at by comparing it to what?

  1. Thickness of the Girdle
  2. Depth of the Diamond
  3. Width of the Diamond
  4. Height of the Crown


There you have it. 52 ways to say I Love the 4 C’s!

How do you think you Scored?

Check your Answers

1) C – G.I.A. – The G.I.A. wrote and devised the 4 C’s!

2) B – 10x – 10 Powered Magnification is what is used to Grade Diamonds with!

3) D – Light Yellow – Light Yellow is the lowest Color Range there is before Fancy Colors!

4) D – D Color is Colorless (No Color) – There is no A B or C Color!

5) A – Blemish – All the others are known as Internal Inclusions!

6) B – Naturals – Naturals often appear around the Girdle and Trigons show up there!

7) A – A Shallow Stone – Because light passes right through a Shallow Stone it often makes it look like a dark circle or a “Fish Eye”!

8) C – 1949 – That’s the year that the 4 C’s were born!

9) B – Cut, Color, Clarity, Carat Weight!

10) D – Crown – Star Facets appear on the Crown (right around the Table Facet)!

11) Octagon!

12) C – Every Cut except the Brilliant – Fancy Cuts are like the Marquise, Princess, Pear, Trillion, Radiant, Emerald, Baguette and Heart Shapes!

13) D – 58 Facets are on a Brilliant Cut Diamond. (57 if there is no Culet!)

14) B – Table Shape – If the Table is Warped, Uneven, or not Straight, the Make is probably off!

15) D – 53-57% is the Percentage of an Ideal Cut Table!

16) A – Sparkle Effects – All those wonderful bursts of Sparkles is called Scintillation! Fluorescence is where it Glows-In-The-Dark!

17) A – The Girdle – When the Girdle is Cut Uneven and is thicker on one side than the other, it’s a “Flat Tire”!

18) D – Culet – If the Culet is large it can look like a Bullet Hole in your Diamond!

19) Fancy Color – Anything beyond Z (Z+) is considered a Fancy Color.

20) B – 24 Different Color Grades: D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z, and Z+

21) D – Z – Z is the lowest Color Range there is. (Z+ is NOT considered a Low Color, but a Fancy Color!)

22) B – Blue – The Hope Diamond (in the Smithsonian Institute) is a Blue Colored Fancy Diamond.

23) A – Amount of Imperfections in a Diamond!

24) D – Warping – Warping is not an Imperfection! All the rest are!

25) B – Black Carbon Spots – The #1 Inclusion is Carbon that never Crystallized properly.

26) B – Estate Jewelry – Estate Jewelry and Antiques often get the Bearded Girdle (Little, Fine Chips around the Girdle’s Edge!)

27) B – Burn out Inclusions – Lasers burn out Inclusions to make the Diamond look better!

28) A – Get rid of Unsightly Inclusions. If Inclusions fall right on the edge of the Girdle, Diamond Cutters will often cut them out.

29) C – Trigons – Little, Inverted Triangular Growth Patterns all stacked together that often look like a Pyramid!

30) D – 11 Clarity Grades – They are: FL, IF, VVS1, VVS2, VS1, VS2, SI1, SI2, I1, I2 and I3.

31) B – False – There is no such thing as I4 Clarity. But anything below an I3 are considered Industrial Diamonds!

32) A – Very, Very Slightly Included – All the rest are just to fool ya!

33) D – 50% – Hard to believe, but half the Diamonds you see in stores are I Clarity!

34) A – Carob Seeds – These little Seeds from the Carob Tree were used to Weigh Diamonds before the Diamond Scale was invented!

35) C – Carat Total Weight – (Meaning all the Carat Weight Combined) CT means Carat Weight! Read: Understanding Carat Weights!

36) A – .38 – Slightly over a 1/3 of a Carat is average!

37) D – Help Identify, Classify and Price Diamonds – The 4 C’s won’t help you with Origin, Density or SI3’s (G.I.A. doesn’t recognize SI3’s).

38) A – Yellow & Brown – Anything below K in Color can either be Yellow, Brown or even Gray in hue.

39) B – R – R is the only Color listed that is in the Light Yellow Color Range!

40) D – D Color is the highest Color Grade you can get in the World!

41) B – Pink – Pink Fancy Colored Diamonds are the rarest!

42) B – Light Brown – Light Browns are Champagne Diamonds, Dark Browns are Chocolate Diamonds!

43) C – Diamond Crystals – Most Inclusions found in a Diamond are made up of Diamond Crystals that didn’t crystallize like the rest of the stone.

44) D – Carbon – 100% Pure Carbon is what a Diamond is made of.

45) A – Gemological Institute of America!

46) B – A Rough Cavity Spot – These Rough Cavities often look like Raised, Jagged Mountains!

47) A – Yellow – Almost all the Diamonds mined from the Earth have some sort of Yellow Hue to them!

48) 100 Points! – 1.00 = 100 Points = 1 Carat!

49) A – Triangle – Trilliants or Trillions are Triangular Shaped Diamonds.

50) D – Cut – Cut takes up 10 lines of Information on the Diamond Reports. Clarity, Color and Carat Weight just take up just 1 each.

51) B – Brilliant Cut – Every time you hear about Ideal Cuts it’s usually referring to the Brilliant Cut Diamond!

52) C – Width of the Diamond – Table Percentages are measured against the widest part of the Diamond.

So how did you do?

Total up your Points and Grade yourself!

0-10 Correct

4 C’s Novice – Wow! Not Good!!! I would go back and either reread the Questions or reread the blogs… All the information is here!

11-20 Correct

4 C’s Rookie – Not Bad, Not Good, you still need a lot of work. Keep at it and you’ll pick up the 4 C’s eventually!

21-30 Correct

4 C’s Scholar – Not too bad! Respectable! It seems like you’ve been doing your homework and studying. Now you just need to keep it up and study more!

31-40 Correct

4 C’s Specialist – Sweet! Impressive! You are getting a pretty good grasp of Diamonds, The 4 C’s, Color, Clarity, Cut and Carat Weight! Not bad at all!

41-50 Correct

4 C’s Master – Excellent! I think you have it! You understand what Quality is all about! You seem to understand the concepts that makes up a Great Diamond! Well Done!

51-54 Correct

4 C’s Diamontologist – Congratulations! Perfect Score! I think you’re a true Pro in the Jewelry Industry. You are a master when it comes to Diamonds and the 4 C’s! :)

If you liked this Quiz, take The Gemstone Quiz and our Diamond Quiz!

If you have any Comments about this 4 C’s Quiz, email me!


Recommended Jewelry Supplies:

Ultrasonic Jewelry Cleaner Jewelry Steam Cleaner Complete Jewelry Cleaner Kit Diamond Dazzle Stick
Gold Silver Jewelry Polishing Cloths Jewelry Making Supplies Kit Gold Acid Test Kit Watch Tool Repair Kit
Ring Adjusters EMT Emergency Ring Cutter 10x Jewelers Loupe Jewelers Microscope

Recommended Jewelry Supplies:

Ultrasonic Jewelry Cleaner Jewelry Steam Cleaner
Complete Jewelry Cleaner Kit Diamond Dazzle Stick
Gold Silver Jewelry Polishing Cloths Jewelry Making Supplies Kit
Gold Acid Test Kit Watch Tool Repair Kit
Ring Adjusters EMT Emergency Ring Cutter
10x Jewelers Loupe Jewelers Microscope

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