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Cushion|Natural|GIA

1.51ct I SI1 Cushion Natural Diamond

ID • I/SI1 • GIA 5242081367

Certificate GIA 5242081367

Diamond specifications and retailer prices

From $2,688 USD
HK$21,000 HKD
As of November 1, 2026
Save $3,729 USD (58%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $6,417 USD 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 I 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 5242081367. Listed at 22 retailers as of November 1, 2026, with prices from $2,688 to $6,417, a $3,729 spread on the same certified stone. MOH London lists it at $6,417. 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
I
Color
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5242081367
Dimensions6.70 × 6.32 × 4.35 mm
L/W Ratio1.06
Girdle conditionFaceted
Top View
6.70 mm6.32 mm1.51 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5242081367
Side View
Table 67.0%CrownGirdle: STK-VTKPavilionCulet: NDepth 68.8%

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 1
Current: $6,417 USD|Low: $2,560 USD|High: $6,417 USD|Avg: $3,747 USD|+1.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
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Retailer 13
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Retailer 15
Retailer 16
Retailer 17
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Retailer 19
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Retailer 21
November 2, 2026
Retailer 21$2,688 USD
Retailer 10$2,795 USD
Retailer 6$2,919 USD
Retailer 8$2,941 USD
Retailer 19$3,136 USD
Retailer 3$3,137 USD
Retailer 5$3,138 USD
Retailer 7$3,220 USD
Retailer 16$3,262 USD
Retailer 15$3,319 USD
Retailer 18$3,380 USD
Retailer 17$3,512 USD
Retailer 12$3,586 USD
Retailer 2$3,702 USD
Retailer 11$3,755 USD
Retailer 4$3,942 USD
Retailer 14$4,040 USD
Retailer 13$4,398 USD
Retailer 20$4,717 USD
Retailer 9$5,674 USD
MOH London$6,417 USD

21 data points across 21 retailers

22 retailers$2,688 USD to $6,417 USD

A
Cheapest Retailer
-
$2,688 USD
HK$21,000 HKD
A
Retailer 2
-
$2,795 USD
View
A
Retailer 3
-
$2,919 USD
View
A
Retailer 4
-
$2,941 USD
View
A
Retailer 5
-
$3,136 USD
€2,987 EUR
View
A
Retailer 6
-
$3,137 USD
View
A
Retailer 7
-
$3,138 USD
View
A
Retailer 8
-
$3,220 USD
View
A
Retailer 9
-
$3,262 USD
View
Final sale: no returns
A
Retailer 10
-
$3,319 USD
View
A
Retailer 11
-
$3,380 USD
View
A
Retailer 12
-
$3,512 USD
£2,765 GBP
View
Retailer 13
-
$3,586 USD
SGD 4,846 SGD
View
Price last confirmed 14 days ago
Retailer 14
-
$3,694 USD
€3,518 EUR
View
Price last confirmed 14 days ago
A
Retailer 15
-
$3,702 USD
£2,915 GBP
View
A
Retailer 16
-
$3,942 USD
View
Retailer 17
-
$4,040 USD
A$6,216 AUD
View
Price last confirmed 24 days ago
B+
Retailer 18
-
$4,398 USD
€4,189 EUR
View
B+
Retailer 19
-
$4,717 USD
ZAR 76,198 ZAR
View
Retailer 20
-
$5,534 USD
View
Price last confirmed 13 days ago
B+
Retailer 21
-
$5,674 USD
View
Most Expensive
B+
MOH London
83C7A565F · Nov 1
$6,417 USD
£5,053 GBP
View
21 more retailers have this diamond
Prices start from $2,688 USDSave up to $3,729 USD

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
$2,688 USD