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Cushion|Natural|GIA

1.51ct G SI1 Cushion Natural Diamond

EX • G/SI1 • GIA 1425256232

Certificate GIA 1425256232

Diamond specifications and retailer prices

From $6,607 AUD
$4,630 USD
As of November 2, 2026
Save $6,311 AUD (49%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $12,917 AUD at MOH London · As of November 1, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1425256232. Listed at 20 retailers as of November 1, 2026, with prices from $6,607 to $12,917, a $6,311 spread on the same certified stone. MOH London lists it at $12,917. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1425256232
Dimensions6.16 × 6.04 × 4.61 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle, Indented Natural
Top View
6.16 mm6.04 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1425256232
Side View
Table 59.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 76.4%

Caratlytics Score

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

Price History

Last verified: Nov 2
Current: $12,917 AUD|Low: $6,353 AUD|High: $13,073 AUD|Avg: $9,020 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 10$6,607 AUD
Retailer 6$6,985 AUD
Retailer 8$6,988 AUD
Retailer 11$7,434 AUD
Retailer 7$7,944 AUD
Retailer 4$8,412 AUD
Retailer 9$8,713 AUD
Retailer 2$9,578 AUD
Retailer 5$10,772 AUD
Retailer 3$12,704 AUD
MOH London$12,917 AUD

45 data points across 11 retailers

20 retailers$6,607 AUD to $12,917 AUD

A
Cheapest Retailer
-
$6,607 AUD
$4,630 USD
A
Retailer 2
-
$6,849 AUD
$4,800 USD
View
A
Retailer 3
-
$6,928 AUD
$4,855 USD
View
A
Retailer 4
-
$6,985 AUD
$4,895 USD
View
A
Retailer 5
-
$6,988 AUD
$4,897 USD
View
Final sale: no returns
A
Retailer 6
-
$7,016 AUD
$4,917 USD
View
A
Retailer 7
-
$7,391 AUD
CA$7,195 CAD
View
A
Retailer 8
-
$7,434 AUD
$5,210 USD
View
B+
Retailer 9
-
$7,460 AUD
$5,228 USD
View
B+
Retailer 10
-
$7,848 AUD
$5,500 USD
View
B+
Retailer 11
-
$7,944 AUD
$5,567 USD
View
B+
Retailer 12
-
$8,373 AUD
$5,868 USD
View
B+
Retailer 13
-
$8,412 AUD
£4,642 GBP
View
Retailer 14
-
$8,713 AUD
View
Price last confirmed 29 days ago
B+
Retailer 15
-
$9,578 AUD
€6,393 EUR
View
Retailer 16
-
$9,669 AUD
$6,776 USD
View
Price last confirmed 10 days ago
B
Retailer 17
-
$9,931 AUD
$6,960 USD
View
B+
Retailer 18
-
$10,772 AUD
ZAR 121,964 ZAR
View
B
Retailer 19
-
$12,704 AUD
$8,903 USD
View
Most Expensive
B
MOH London
C97E3DB6C · Nov 1
$12,917 AUD
£7,128 GBP
View
19 more retailers have this diamond
Prices start from $6,607 AUDSave up to $6,311 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
$6,607 AUD