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Cushion|Natural|GIA

0.51ct D SI1 Cushion Natural Diamond

EX • D/SI1 • GIA 6193146707

Certificate GIA 6193146707

Diamond specifications and retailer prices

From $1,802 NZD
As of November 5, 2026
Save $1,923 NZD (52%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $3,725 NZD at MOH London · As of November 2, 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6193146707. Listed at 9 retailers as of November 2, 2026, with prices from $1,802 to $3,725, a $1,923 spread on the same certified stone. MOH London lists it at $3,725. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6193146707
Dimensions4.63 × 4.62 × 3.22 mm
L/W Ratio1.00
Top View
4.63 mm4.62 mm0.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6193146707
Side View
Table 56.0%CrownGirdle: MED-STKPavilionCulet: NDepth 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 5
Current: $3,725 NZD|Low: $1,842 NZD|High: $3,771 NZD|Avg: $2,765 NZD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6$1,842 NZD
Retailer 3$2,295 NZD
Retailer 5$2,659 NZD
Retailer 2$2,832 NZD
Retailer 4$3,139 NZD
MOH London$3,725 NZD

45 data points across 6 retailers

9 retailers$1,802 NZD to $3,725 NZD

B+
Cheapest Retailer
-
$1,802 NZD
B+
Retailer 2
-
$1,804 NZD
View
Retailer 3
-
$1,842 NZD
View
Price last confirmed 9 days ago
B
Retailer 4
-
$2,295 NZD
View
Retailer 5
-
$2,659 NZD
View
Price last confirmed 33 days ago
B
Retailer 6
-
$2,832 NZD
View
B
Retailer 7
-
$3,119 NZD
View
B
Retailer 8
-
$3,139 NZD
View
Most Expensive
B
MOH London
512FEF2A3 · Nov 2
$3,725 NZD
£1,626 GBP
View
8 more retailers have this diamond
Prices start from $1,802 NZDSave up to $1,923 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
$1,802 NZD