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Cushion|Natural|GIA

1.51ct F SI2 Cushion Natural Diamond

EX • F/SI2 • GIA 2556417868

Certificate GIA 2556417868

Diamond specifications and retailer prices

From $4,621 AUD
HK$25,300 HKD
As of November 2, 2026
Save $5,188 AUD (53%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $9,809 AUD at MOH London · As of November 2, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556417868. Listed at 13 retailers as of November 2, 2026, with prices from $4,621 to $9,809, a $5,188 spread on the same certified stone. MOH London lists it at $9,809. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556417868
Dimensions6.56 × 6.51 × 4.34 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.56 mm6.51 mm1.51 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556417868
Side View
Table 66.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.7%

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 2
Current: $9,809 AUD|Low: $4,548 AUD|High: $10,340 AUD|Avg: $6,190 AUD|-3.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 5$4,621 AUD
Retailer 12$4,642 AUD
Retailer 11$4,881 AUD
Retailer 3$4,954 AUD
Retailer 9$5,148 AUD
Retailer 2$5,534 AUD
Retailer 8$5,538 AUD
Retailer 6$5,803 AUD
Retailer 10$5,879 AUD
Retailer 7$6,968 AUD
Retailer 4$9,599 AUD
MOH London$9,809 AUD

30 data points across 12 retailers

13 retailers$4,621 AUD to $9,809 AUD

A
Cheapest Retailer
-
$4,621 AUD
HK$25,300 HKD
A
Retailer 2
-
$4,642 AUD
$3,253 USD
View
A
Retailer 3
-
$4,881 AUD
$3,421 USD
View
A
Retailer 4
-
$4,954 AUD
$3,472 USD
View
A
Retailer 5
-
$5,148 AUD
$3,608 USD
View
Final sale: no returns
A
Retailer 6
-
$5,534 AUD
View
A
Retailer 7
-
$5,538 AUD
$3,881 USD
View
A
Retailer 8
-
$5,803 AUD
£3,202 GBP
View
A
Retailer 9
-
$5,879 AUD
£3,244 GBP
View
A
Retailer 10
-
$6,259 AUD
View
A
Retailer 11
-
$6,968 AUD
€4,651 EUR
View
Retailer 12
-
$9,599 AUD
$6,727 USD
View
Price last confirmed 10 days ago
Most Expensive
B+
MOH London
81F518F49 · Nov 2
$9,809 AUD
£5,413 GBP
View
12 more retailers have this diamond
Prices start from $4,621 AUDSave up to $5,188 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
$4,621 AUD