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Understanding the 4Cs of Diamonds

Introduction

When shopping for a diamond engagement ring, understanding the 4Cs is essential. These four characteristics—Cut, Color, Clarity, and Carat—determine a diamond’s quality, beauty, and value.

Four round brilliant diamonds displayed on black velvet, each highlighting one of the 4Cs - one showing exceptional light return from ideal cut, one demonstrating color grades, one with visible clarity differences, and one comparing carat sizes, dramatic spot lighting

The 4Cs Explained

Cut: The Sparkle Factor

The cut is arguably the most important factor affecting a diamond’s beauty. A well-cut diamond reflects light beautifully, creating that coveted sparkle.

Cross-section diagram of a round brilliant diamond showing ideal cut proportions - light rays entering the crown, reflecting internally off pavilion facets, and returning through the table as brilliant fire and scintillation, technical yet elegant illustration

Pro Tip
Always prioritize cut quality over carat weight. A smaller, well-cut diamond will appear more brilliant than a larger, poorly cut one.

Cut grades range from:

  • Excellent/Ideal
  • Very Good
  • Good
  • Fair
  • Poor

Color: The Presence of Hue

Diamond color actually refers to the absence of color. The most valuable diamonds are completely colorless.

GradeDescription
D-FColorless
G-JNear Colorless
K-MFaint Yellow
N-RVery Light Yellow
S-ZLight Yellow

Clarity: Internal Characteristics

Clarity measures the presence of inclusions (internal) and blemishes (external).

Clarity grades:

  • FL (Flawless)
  • IF (Internally Flawless)
  • VVS1/VVS2 (Very Very Slightly Included)
  • VS1/VS2 (Very Slightly Included)
  • SI1/SI2 (Slightly Included)
  • I1/I2/I3 (Included)

Carat: The Weight

Carat refers to the diamond’s weight, not its size. One carat equals 200 milligrams.

Did You Know?
The average engagement ring diamond in the US is between 1.0 and 1.2 carats.

Finding the Right Balance

The key to finding the perfect diamond is balancing all four Cs within your budget:

  1. Start with cut - This has the biggest impact on beauty
  2. Choose color based on setting - G-H looks colorless in most settings
  3. Select clarity wisely - VS2 or SI1 are often “eye-clean”
  4. Adjust carat to fit budget - Consider slightly under popular weights (0.9 vs 1.0)

Try the Brilliance Chase mini-game

Catch clean light, dodge inclusions, and keep the brilliance meter alive while you balance the 4Cs in motion.

Conclusion

Understanding the 4Cs empowers you to make an informed decision. Remember, there’s no single “perfect” combination—the best diamond is one that fits your preferences and budget while maximizing beauty.

Next Steps