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Cushion|Natural|GIA

0.40ct D SI2 Cushion Natural Diamond

VG • D/SI2 • GIA 2121779507

Certificate GIA 2121779507

Diamond specifications and retailer prices

From €550 EUR
£484 GBP
As of November 1, 2026
Save €542 EUR (50%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: €1,091 EUR at MOH London · As of November 1, 2026
View at MOH London

About this 0.4ct natural cushion diamond

This 0.4ct natural cushion sits in the sub-half-carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2121779507. Listed at 4 retailers as of November 1, 2026, with prices from €550 to €1,091, a €542 spread on the same certified stone. MOH London lists it at €1,091. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.40
Carat
D
Color
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishGood
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 2121779507
Dimensions7.79 × 3.62 × 2.24 mm
L/W Ratio2.15
Culet sizeNone
Top View
7.79 mm3.62 mm0.40 ctD / SI2
OriginNatural
CutVery Good
PolishGood
SymmetryVery Good
FluorescenceStrong
CertificateGIA 2121779507
Side View
Table 65.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 61.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: €1,091 EUR|Low: €512 EUR|High: €1,105 EUR|Avg: €748 EUR|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 1, 2026
Retailer 2€550 EUR
Retailer 4€648 EUR
Retailer 3€706 EUR
MOH London€1,091 EUR

42 data points across 4 retailers

4 retailers€550 EUR to €1,091 EUR

B+
Cheapest Retailer
-
€550 EUR
£484 GBP
B+
Retailer 2
-
€648 EUR
£570 GBP
View
B
Retailer 3
-
€706 EUR
View
Most Expensive
B
MOH London
0B4A19B34 · Nov 1
€1,091 EUR
£960 GBP
View
3 more retailers have this diamond
Prices start from €550 EURSave up to €542 EUR

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+
0.40ct Cushion
€550 EUR