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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 $3,986 AUD
As of November 6, 2026
Save $5,509 AUD (58%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $9,495 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 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 2, 2026, with prices from $3,986 to $9,495, a $5,509 spread on the same certified stone. MOH London lists it at $9,495. 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
Colour
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 6
Current: $9,495 AUD|Low: $3,726 AUD|High: $9,495 AUD|Avg: $5,418 AUD|+3.2%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 7, 2026
Retailer 6$3,986 AUD
Retailer 18$4,046 AUD
Retailer 17$4,320 AUD
Retailer 3$4,355 AUD
Retailer 10$4,567 AUD
Retailer 12$4,589 AUD
Retailer 13$4,619 AUD
Retailer 8$4,748 AUD
Retailer 7$4,829 AUD
Retailer 9$4,919 AUD
Retailer 19$4,948 AUD
Retailer 2$5,060 AUD
Retailer 14$5,357 AUD
Retailer 11$5,465 AUD
Retailer 5$5,833 AUD
Retailer 15$6,383 AUD
Retailer 16$6,929 AUD
Retailer 4$8,392 AUD
MOH London$9,495 AUD

23 data points across 19 retailers

22 retailers$3,986 AUD to $9,495 AUD

A
Cheapest Retailer
-
$3,986 AUD
A
Retailer 2
-
$4,046 AUD
View
A
Retailer 3
-
$4,320 AUD
View
A
Retailer 4
-
$4,355 AUD
View
A
Retailer 5
-
$4,567 AUD
View
A
Retailer 6
-
$4,589 AUD
View
A
Retailer 7
-
$4,619 AUD
View
A
Retailer 8
-
$4,748 AUD
View
Final sale: no returns
A
Retailer 9
-
$4,829 AUD
View
A
Retailer 10
-
$4,919 AUD
View
A
Retailer 11
-
$4,948 AUD
View
A
Retailer 12
-
$5,060 AUD
View
Retailer 13
-
$5,219 AUD
View
Price last confirmed 19 days ago
A
Retailer 14
-
$5,357 AUD
View
Retailer 15
-
$5,376 AUD
View
Price last confirmed 19 days ago
A
Retailer 16
-
$5,833 AUD
View
Retailer 17
-
$5,880 AUD
View
Price last confirmed 30 days ago
B+
Retailer 18
-
$6,383 AUD
View
B+
Retailer 19
-
$6,929 AUD
View
Retailer 20
-
$8,054 AUD
View
Price last confirmed 19 days ago
B
Retailer 21
-
$8,392 AUD
View
Most Expensive
B
MOH London
83C7A565F · Nov 2
$9,495 AUD
£5,137 GBP
View
21 more retailers have this diamond
Prices start from $3,986 AUDSave up to $5,509 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
$3,986 AUD