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Cushion|Natural|GIA

0.51ct D SI1 Cushion Natural Diamond

VG • D/SI1 • GIA 6421683223

Certificate GIA 6421683223

Diamond specifications and retailer prices

From $1,443 NZD
As of November 6, 2026
Save $1,581 NZD (52%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $3,024 NZD at MOH London · As of November 4, 2026
View at MOH London

About this 0.51ct natural cushion diamond

This 0.51ct natural cushion sits in the half to three-quarter carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6421683223. Listed at 16 retailers as of November 4, 2026, with prices from $1,443 to $3,024, a $1,581 spread on the same certified stone. MOH London lists it at $3,024. 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

0.51
Carat
D
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6421683223
Dimensions4.68 × 4.18 × 2.92 mm
L/W Ratio1.12
Top View
4.68 mm4.18 mm0.51 ctD / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6421683223
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 69.8%

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 6
Current: $3,024 NZD|Low: $1,582 NZD|High: $3,065 NZD|Avg: $2,150 NZD|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 5$1,651 NZD
Retailer 9$1,663 NZD
Retailer 4$1,669 NZD
Retailer 8$1,694 NZD
Retailer 6$1,966 NZD
Retailer 10$2,188 NZD
Retailer 2$2,370 NZD
Retailer 7$2,545 NZD
Retailer 3$2,612 NZD
MOH London$3,024 NZD

45 data points across 10 retailers

16 retailers$1,443 NZD to $3,024 NZD

B+
Cheapest Retailer
-
$1,443 NZD
Retailer 2
-
$1,651 NZD
View
Price last confirmed 17 days ago
B
Retailer 3
-
$1,656 NZD
View
B
Retailer 4
-
$1,663 NZD
View
B
Retailer 5
-
$1,669 NZD
View
Retailer 6
-
$1,694 NZD
View
Price last confirmed 9 days ago
B
Retailer 7
-
$1,710 NZD
View
B
Retailer 8
-
$1,786 NZD
View
B
Retailer 9
-
$1,786 NZD
View
B
Retailer 10
-
$1,858 NZD
View
B
Retailer 11
-
$1,932 NZD
View
B
Retailer 12
-
$1,966 NZD
View
B
Retailer 13
-
$2,370 NZD
View
Retailer 14
-
$2,545 NZD
View
Price last confirmed 33 days ago
B
Retailer 15
-
$2,612 NZD
View
Most Expensive
B
MOH London
D98507D3B · Nov 4
$3,024 NZD
£1,320 GBP
View
15 more retailers have this diamond
Prices start from $1,443 NZDSave up to $1,581 NZD

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+
0.51ct Cushion
$1,443 NZD