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Cushion|Natural|GIA

1.51ct F SI1 Cushion Natural Diamond

ID • F/SI1 • GIA 2235655108

Certificate GIA 2235655108

Diamond specifications and retailer prices

From $5,904 AUD
$4,138 USD
As of November 1, 2026
Save $5,255 AUD (47%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $11,159 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2235655108. Listed at 13 retailers as of November 1, 2026, with prices from $5,904 to $11,159, a $5,255 spread on the same certified stone. MOH London lists it at $11,159. 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle36.75°
Pavilion angle32.53°
OriginNatural
Grading LabGIA
CertificateGIA 2235655108
Dimensions6.49 × 6.46 × 4.25 mm
L/W Ratio1.00
Girdle conditionThick
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
6.49 mm6.46 mm1.51 ctF / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 2235655108
Side View
Table 62.0%Crown 36.75°Girdle: STK-THKPavilion 32.53°Culet: NoneDepth 65.8%

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 1
Current: $11,159 AUD|Low: $5,904 AUD|High: $12,042 AUD|Avg: $7,613 AUD|-7.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 3$5,904 AUD
Retailer 12$6,050 AUD
Retailer 7$6,051 AUD
Retailer 9$6,515 AUD
Retailer 4$6,748 AUD
Retailer 13$6,778 AUD
Retailer 6$7,035 AUD
Retailer 8$7,206 AUD
Retailer 11$7,206 AUD
Retailer 10$7,448 AUD
Retailer 2$7,927 AUD
Retailer 5$10,239 AUD
MOH London$11,159 AUD

37 data points across 13 retailers

13 retailers$5,904 AUD to $11,159 AUD

A
Cheapest Retailer
-
$5,904 AUD
$4,138 USD
A
Retailer 2
-
$6,050 AUD
$4,240 USD
View
A
Retailer 3
-
$6,051 AUD
CA$5,890 CAD
View
A
Retailer 4
-
$6,515 AUD
$4,566 USD
View
A
Retailer 5
-
$6,748 AUD
$4,729 USD
View
A
Retailer 6
-
$6,778 AUD
$4,750 USD
View
A
Retailer 7
-
$7,035 AUD
£3,882 GBP
View
A
Retailer 8
-
$7,206 AUD
$5,050 USD
View
A
Retailer 9
-
$7,206 AUD
$5,050 USD
View
A
Retailer 10
-
$7,448 AUD
$5,220 USD
View
A
Retailer 11
-
$7,927 AUD
€5,291 EUR
View
B+
Retailer 12
-
$10,239 AUD
$7,176 USD
View
Most Expensive
B+
MOH London
722B21398 · Nov 2
$11,159 AUD
£6,158 GBP
View
12 more retailers have this diamond
Prices start from $5,904 AUDSave up to $5,255 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
$5,904 AUD