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Cushion|Natural|GIA

1.51ct I SI2 Cushion Natural Diamond

EX • I/SI2 • GIA 6551796873

Certificate GIA 6551796873

Diamond specifications and retailer prices

From $3,836 AUD
As of November 6, 2026
Save $4,989 AUD (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $8,826 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551796873. Listed at 8 retailers as of November 2, 2026, with prices from $3,836 to $8,826, a $4,989 spread on the same certified stone. MOH London lists it at $8,826. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle35.97°
OriginNatural
Grading LabGIA
CertificateGIA 6551796873
Dimensions7.56 × 5.87 × 4.09 mm
L/W Ratio1.29
Key to symbols
Crystal, Cloud, Feather, Knot, Needle
Top View
7.56 mm5.87 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551796873
Side View
Table 64.0%CrownGirdle: MED-VTKPavilion 35.97°Culet: NoneDepth 69.7%

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 6
Current: $8,826 AUD|Low: $3,836 AUD|High: $9,750 AUD|Avg: $5,912 AUD|-9.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2$3,836 AUD
Retailer 7$4,772 AUD
Retailer 3$5,042 AUD
Retailer 5$5,340 AUD
Retailer 6$5,595 AUD
Retailer 4$6,180 AUD
MOH London$8,826 AUD

43 data points across 7 retailers

8 retailers$3,836 AUD to $8,826 AUD

A
Cheapest Retailer
-
$3,836 AUD
A
Retailer 2
-
$4,772 AUD
View
A
Retailer 3
-
$5,042 AUD
View
A
Retailer 4
-
$5,340 AUD
View
A
Retailer 5
-
$5,595 AUD
View
A
Retailer 6
-
$5,816 AUD
View
A
Retailer 7
-
$6,180 AUD
View
Most Expensive
B
MOH London
FA73139D7 · Nov 2
$8,826 AUD
£4,775 GBP
View
7 more retailers have this diamond
Prices start from $3,836 AUDSave up to $4,989 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
$3,836 AUD