Diamond Natural 0,4Ct I-SI1 Marquise - GIA6531971335 1
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The 4 C’s of this diamond

Carat
Carat
0.40 ct

The weight of the diamond. Carat weight is a key factor in a diamond’s value.

Colour
Colour
D E F G H I J K L M N

Near colourless. Slight warmth visible to the trained eye.

Clarity
Clarity
SI1

Noticeable inclusions at 10×, usually eye-clean.

Cut
Cut
-

Excellent light performance and brilliance.

Natural Diamond Natural 0,4Ct I-SI1 Marquise - GIA6531971335

1037.70 (EUR)
From €40/month over 24 payments with
Natural diamond
GIA Certified
Delivery date
10 days
Secure delivery
Diamond Details
Color I
Shape Marquise
Clarity SI1
Cut Grade -
Lab GIA
Polish Very Good
Symmetry Very Good
Fluorescence Faint
Measurements 7.97 x 3.56 x 2.34
Depth 65.6
Table 61.0
Carat 0.40 ct
Price Per Carat 13513.00
Diamond certificate See the diamond certificate
Expert Guidance
Personal consultation with our jewelry specialists - at every step.

FIRESC Guide to Choosing a Diamond

Choosing a diamond shouldn’t be complicated. In practice, a diamond’s value and beauty are mainly determined by three essential elements: color, clarity and cut.

At FIRESC we always recommend choosing a balanced diamond — not necessarily the most expensive, but the one that offers the best visual beauty for your budget.

1. Diamond Color

Diamond color is graded from D to Z:

  • D-F → exceptionally white (very rare)
  • G-H → premium white (excellent beauty/value balance)
  • I-J → slightly warm, still very attractive in most settings
  • K+ → noticeable yellow tint

For most clients, G-H provides the best balance between a premium look and value.

Diamond color scale D-Z

FIRESC recommendations

  • For a very white appearance: F-G
  • Best value/quality balance: G-H
  • For a larger-looking diamond within the same budget: I-J

2. Diamond Clarity

Clarity indicates how “clean” a diamond is internally. Most inclusions are NOT visible to the naked eye.

  • FL / IF → extremely rare
  • VVS1-VVS2 → inclusions very difficult to see
  • VS1-VS2 → excellent for most clients
  • SI1-SI2 → small inclusions, sometimes invisible without magnification

In practice, many VS and some SI1 diamonds appear perfect to the human eye.

Diamond clarity grades

FIRESC recommendations

  • Ideal balance: VS1-VS2
  • Discreet premium: VVS2
  • Smart budget optimization: certain SI1 eye-clean diamonds

3. Diamond Cut

Cut is the most important factor for brilliance. A well-cut diamond can look larger, brighter and more valuable. A poorly cut diamond will look “dull,” even if it has excellent color and clarity.

Diamond cut comparison

FIRESC recommendation

Always choose Excellent or Very Good cut.

Better to have a diamond with color G, clarity VS2 and an Excellent cut than one with color D, clarity VVS1 but a poor cut.

FIRESC recommendation for most clients

For an elegant, spectacular diamond that’s well optimized as an investment:

  • ColorG-H
  • ClarityVS1-VS2
  • CutExcellent / Very Good
  • CertificateGIA / IGI

What truly matters?

A diamond should look beautiful in real light, have correct proportions, deliver authentic brilliance, and fit smartly within your budget.

At FIRESC, every diamond is selected so the client receives the maximum beauty and real value — not just impressive specifications on paper.

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1037.70 (EUR)
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Why choose this diamond

Hand-selected. Lab-certified. Yours alone.

A beautiful balance of size, quality and value. This 0.40 ct I-SI1 marquise features excellent cut and polish for exceptional brilliance.

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