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Cushion|Lab Grown|IGI

5.18ct D IF Cushion Lab Grown Diamond

ID • D/IF

Diamond specifications and retailer prices

From €14,571 EUR
$16,279 USD
As of October 31, 2026
2 retailers carry this diamond
Most expensive: €14,571 EUR at Blue Nile
View at Blue Nile

About this 5.18ct lab-grown cushion diamond

This 5.18ct lab-grown cushion sits in the over five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI. Listed at 2 retailers as of October 31, 2026. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

5.18
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions11.71 × 7.95 × 5.11 mm
L/W Ratio1.47
Top View
11.71 mm7.95 mm5.18 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 63.0%CrownGirdle: STK-THKPavilionCulet: LNGDepth 64.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 31
Current: €14,571 EUR|Low: €5,801 EUR|High: €17,508 EUR|Avg: €12,156 EUR|+9.9%
Blue Nile
Retailer 2
Retailer 3
October 31, 2026
Retailer 2€5,801 EUR
Blue Nile€14,571 EUR
Retailer 3€17,508 EUR

35 data points across 3 retailers

2 retailers

Retailer 1
-
€5,801 EUR
$6,481 USD
Price last confirmed 9 days ago
Most Expensive
B+
Blue Nile
28013504 · Oct 31
€14,571 EUR
$16,279 USD
View
1 more retailer has this diamond

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
5.18ct Cushion
€14,571 EUR