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Cushion|Natural|GIA

1.51ct D SI2 Cushion Natural Diamond

EX • D/SI2 • GIA 6555141851

Certificate GIA 6555141851

Diamond specifications and retailer prices

From $5,921 AUD
$4,159 USD
As of October 30, 2026
Save $4,949 AUD (46%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $10,870 AUD at MOH London · As of October 29, 2026
View at MOH London

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555141851. Listed at 8 retailers as of October 29, 2026, with prices from $5,921 to $10,870, a $4,949 spread on the same certified stone. MOH London lists it at $10,870. 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

1.51
Carat
D
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6555141851
Dimensions7.82 × 5.90 × 3.95 mm
L/W Ratio1.33
Top View
7.82 mm5.90 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6555141851
Side View
Table 57.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 66.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $10,870 AUD|Low: $5,155 AUD|High: $11,868 AUD|Avg: $7,164 AUD|-8.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 7$5,921 AUD
Retailer 3$5,952 AUD
Retailer 8$6,267 AUD
Retailer 5$6,416 AUD
Retailer 6$6,452 AUD
Retailer 2$6,478 AUD
Retailer 4$6,751 AUD
Retailer 9$7,223 AUD
MOH London$10,870 AUD

45 data points across 9 retailers

8 retailers$5,921 AUD to $10,870 AUD

A
Cheapest Retailer
-
$5,921 AUD
$4,159 USD
A
Retailer 2
-
$5,952 AUD
₹398,173 INR
View
A
Retailer 3
-
$6,267 AUD
$4,402 USD
View
Final sale: no returns
A
Retailer 4
-
$6,416 AUD
£3,549 GBP
View
A
Retailer 5
-
$6,452 AUD
$4,532 USD
View
A
Retailer 6
-
$6,478 AUD
View
A
Retailer 7
-
$6,751 AUD
£3,734 GBP
View
Most Expensive
B+
MOH London
FD5D29FA0 · Oct 29
$10,870 AUD
£6,012 GBP
View
7 more retailers have this diamond
Prices start from $5,921 AUDSave up to $4,949 AUD

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.

A
1.51ct Cushion
$5,921 AUD