CaratHunter
Plans
Cushion|Natural|GIA

1.51ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 2557433923

Certificate GIA 2557433923

Diamond specifications and retailer prices

From $7,134 AUD
As of November 6, 2026
Save $6,915 AUD (49%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $14,049 AUD at MOH London · As of November 7, 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 F 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 2557433923. Listed at 8 retailers as of November 6, 2026, with prices from $7,134 to $14,049, a $6,915 spread on the same certified stone. MOH London lists it at $14,049. 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
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557433923
Dimensions7.67 × 6.00 × 4.15 mm
L/W Ratio1.28
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
7.67 mm6.00 mm1.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557433923
Side View
Table 63.0%CrownGirdle: STK-VTKPavilionCulet: NDepth 69.3%

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: $14,049 AUD|Low: $7,134 AUD|High: $15,376 AUD|Avg: $9,712 AUD|-8.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 7, 2026
Retailer 5$7,134 AUD
Retailer 2$7,928 AUD
Retailer 4$8,107 AUD
Retailer 6$8,529 AUD
Retailer 8$8,644 AUD
Retailer 7$9,073 AUD
Retailer 3$10,505 AUD
MOH London$14,049 AUD

42 data points across 8 retailers

8 retailers$7,134 AUD to $14,049 AUD

A
Cheapest Retailer
-
$7,134 AUD
A
Retailer 2
-
$7,928 AUD
View
Retailer 3
-
$8,107 AUD
View
Price last confirmed 3 days ago
B+
Retailer 4
-
$8,529 AUD
View
Retailer 5
-
$8,644 AUD
View
Price last confirmed 24 days ago
B+
Retailer 6
-
$9,073 AUD
View
Final sale: no returns
B+
Retailer 7
-
$10,505 AUD
View
Most Expensive
B
MOH London
4AF0B12A7 · Nov 7
$14,049 AUD
£7,601 GBP
View
7 more retailers have this diamond
Prices start from $7,134 AUDSave up to $6,915 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
$7,134 AUD