WHAT TO KNOW BEFORE BUYING A DIAMOND:
THE 4Cs

What to Know Before Buying a Diamond: The Essential Guide to the 4Cs
When buying a diamond , knowledge is your most valuable tool. The value, beauty, and uniqueness of each gem are determined by the famous 4Cs : Cut, Color, Clarity, and Carat .
We at Atelier Diamanti e Gioielli guide you through these crucial factors to ensure you get a certified diamond and perfect.
1. Cut – The Diamond Cut: The True Light
The cut is not the shape (like round or princess ), but the skill with which the diamond It reflects light. A well-cut diamond appears bright and vivid; a poorly cut one appears dull.
- Ideal Cut: An Ideal Cut diamond —like ours—has perfect proportions and symmetry. It reflects light evenly, maximizing:
- Brilliance: The reflected white light.
- Fire: The dispersion in rainbow colors.
- Scintillation: The visible flashes of light in motion.
Expert Tip: A great cut can make the look jewel bigger and brighter, even at the same carats.
2. Color – The Color of the Diamond: Return to the Colorless
Colorless diamonds are the rarest and most valuable. Color is rated on a scale from D (colorless) to Z (highly colored) .
- Key Categories to Buy:
- DF (Colorless): Highest quality, ideal for solitaire and engagement rings .
- GJ (Almost colorless): Excellent balance between quality and price.
- K (Lightly Tinted): Visible yellow tint.
Note: Mounted in a ring , the difference between hues (such as F and G) is often imperceptible to the naked eye.
3. Clarity – The Clarity of the Diamond: Purity and Imperfections
Clarity measures the presence of internal ( inclusions ) or external ( blemish ) imperfections. The clarity scale is crucial for the diamond value
Optimal Grades for Quality/Price:
- VS1–VS2: Very slight imperfections, invisible to the naked eye. They are the best compromise.
- SI1–SI2: Small inclusions, generally not visible without a lens, but require careful selection.
- IF–VVS: Near perfect clarity, extremely rare and expensive.
4. Carat – The Weight of the Diamond: Size vs. Quality
Carat (ct) measures the weight of the diamond (1 carat = 0.2 grams). It's often believed that size is everything, but that's not the case.
- Exponential Value: I large and pure diamonds They are much rarer, which increases their value exponentially.
- Priority: Choosing the ideal carat depends on taste and budget, but it is almost always better to choose an excellent cut and color over a slightly lower weight.
ALSO
- Most diamonds lose up to 65% of their rough weight during cutting
- Large, pure diamonds are much rarer → exponential value
Choosing the ideal carat depends on taste, budget, and proportion to the setting. It's often better to choose an excellent cut on a slightly lighter weight.

Final Tips: Buy Your Certified Diamond in Rome
For a purchase in complete safety and transparency:
- Certification: Always check that the diamond is accompanied by a GIA, IGI or HRD international certificate .
- Identification: Check that the certificate number is laser engraved on the stone's girdle (for diamonds over 0.30 ct).
- Contact Expert: Don't just focus on the carat. A ideal cut shines more and it looks bigger.
Contact us now at 3313365979 for a free consultation. Discover our certified and customizable diamonds in Rome , carefully selected and accompanied by international certifications.
