CaratHunter
Plans
Cushion|Natural|GIA

1.51ct D SI1 Cushion Natural Diamond

EX • D/SI1 • GIA 6511643903

Certificate GIA 6511643903

Diamond specifications and retailer prices

From $6,469 AUD
As of November 6, 2026
Save $4,665 AUD (42%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $11,135 AUD at MOH London · As of November 4, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6511643903. Listed at 11 retailers as of November 4, 2026, with prices from $6,469 to $11,135, a $4,665 spread on the same certified stone. MOH London lists it at $11,135. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6511643903
Dimensions7.13 × 5.95 × 4.15 mm
L/W Ratio1.20
Top View
7.13 mm5.95 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6511643903
Side View
Table 69.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 69.8%

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: Nov 6
Current: $11,135 AUD|Low: $6,469 AUD|High: $11,299 AUD|Avg: $7,817 AUD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9$6,469 AUD
Retailer 2$6,522 AUD
Retailer 8$6,688 AUD
Retailer 5$6,902 AUD
Retailer 11$7,009 AUD
Retailer 10$7,066 AUD
Retailer 3$7,229 AUD
Retailer 4$7,888 AUD
Retailer 6$8,552 AUD
Retailer 7$9,687 AUD
MOH London$11,135 AUD

33 data points across 11 retailers

11 retailers$6,469 AUD to $11,135 AUD

A
Cheapest Retailer
-
$6,469 AUD
Final sale: no returns
A
Retailer 2
-
$6,522 AUD
View
A
Retailer 3
-
$6,688 AUD
View
A
Retailer 4
-
$6,902 AUD
View
Retailer 5
-
$7,009 AUD
View
Price last confirmed 9 days ago
Retailer 6
-
$7,066 AUD
View
Price last confirmed 29 days ago
A
Retailer 7
-
$7,229 AUD
View
A
Retailer 8
-
$7,888 AUD
View
A
Retailer 9
-
$8,552 AUD
View
B+
Retailer 10
-
$9,687 AUD
View
Most Expensive
B+
MOH London
69AF21D71 · Nov 4
$11,135 AUD
£6,024 GBP
View
10 more retailers have this diamond
Prices start from $6,469 AUDSave up to $4,665 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
$6,469 AUD