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Cushion|Natural|GIA

1.51ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 2235954416

Certificate GIA 2235954416

Diamond specifications and retailer prices

From $4,918 AUD
As of November 5, 2026
Save $5,727 AUD (54%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $10,645 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 H 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 2235954416. Listed at 10 retailers as of November 4, 2026, with prices from $4,918 to $10,645, a $5,727 spread on the same certified stone. MOH London lists it at $10,645. 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle35.88°
OriginNatural
Grading LabGIA
CertificateGIA 2235954416
Dimensions7.56 × 5.91 × 4.06 mm
L/W Ratio1.28
Key to symbols
Cloud, Needle
Top View
7.56 mm5.91 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2235954416
Side View
Table 65.0%CrownGirdle: STK-VTKPavilion 35.88°Culet: NoneDepth 68.7%

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 5
Current: $10,645 AUD|Low: $4,918 AUD|High: $11,639 AUD|Avg: $7,211 AUD|-8.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 5$4,918 AUD
Retailer 7$5,743 AUD
Retailer 8$5,999 AUD
Retailer 4$6,249 AUD
Retailer 2$6,279 AUD
Retailer 6$7,131 AUD
Retailer 9$7,338 AUD
Retailer 3$7,715 AUD
MOH London$10,645 AUD

34 data points across 9 retailers

10 retailers$4,918 AUD to $10,645 AUD

A
Cheapest Retailer
-
$4,918 AUD
A
Retailer 2
-
$5,743 AUD
View
A
Retailer 3
-
$5,999 AUD
View
A
Retailer 4
-
$6,249 AUD
View
A
Retailer 5
-
$6,279 AUD
View
B+
Retailer 6
-
$7,131 AUD
View
B+
Retailer 7
-
$7,338 AUD
View
Final sale: no returns
B+
Retailer 8
-
$7,414 AUD
View
B+
Retailer 9
-
$7,715 AUD
View
Most Expensive
B
MOH London
0C16BD85B · Nov 4
$10,645 AUD
£5,759 GBP
View
9 more retailers have this diamond
Prices start from $4,918 AUDSave up to $5,727 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
$4,918 AUD