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Cushion|Natural|GIA

1.51ct I SI1 Cushion Natural Diamond

GD • I/SI1 • GIA 6555305528

Certificate GIA 6555305528

Diamond specifications and retailer prices

From $5,923 AUD
As of November 6, 2026
Save $6,603 AUD (53%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $12,526 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6555305528. Listed at 20 retailers as of November 4, 2026, with prices from $5,923 to $12,526, a $6,603 spread on the same certified stone. MOH London lists it at $12,526. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555305528
Dimensions7.40 × 5.68 × 4.14 mm
L/W Ratio1.30
Girdle conditionFaceted
Top View
7.40 mm5.68 mm1.51 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555305528
Side View
Table 66.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 72.8%

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: $12,526 AUD|Low: $5,857 AUD|High: $12,700 AUD|Avg: $7,778 AUD|-1.4%
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
November 7, 2026
Retailer 6$5,923 AUD
Retailer 9$5,923 AUD
Retailer 16$6,318 AUD
Retailer 10$6,568 AUD
Retailer 8$6,593 AUD
Retailer 15$6,616 AUD
Retailer 11$6,648 AUD
Retailer 3$6,731 AUD
Retailer 4$6,967 AUD
Retailer 7$7,066 AUD
Retailer 5$7,088 AUD
Retailer 12$7,441 AUD
Retailer 2$7,638 AUD
Retailer 18$7,680 AUD
Retailer 13$8,874 AUD
Retailer 14$9,620 AUD
Retailer 17$12,250 AUD
MOH London$12,526 AUD

22 data points across 18 retailers

20 retailers$5,923 AUD to $12,526 AUD

A
Cheapest Retailer
-
$5,923 AUD
A
Retailer 2
-
$5,923 AUD
View
B+
Retailer 3
-
$6,318 AUD
View
B+
Retailer 4
-
$6,568 AUD
View
B+
Retailer 5
-
$6,593 AUD
View
Final sale: no returns
B+
Retailer 6
-
$6,616 AUD
View
B+
Retailer 7
-
$6,648 AUD
View
B+
Retailer 8
-
$6,731 AUD
View
B+
Retailer 9
-
$6,967 AUD
View
B+
Retailer 10
-
$7,066 AUD
View
B+
Retailer 11
-
$7,088 AUD
View
B+
Retailer 12
-
$7,441 AUD
View
B+
Retailer 13
-
$7,638 AUD
View
B+
Retailer 14
-
$7,680 AUD
View
B
Retailer 15
-
$7,689 AUD
View
Retailer 16
-
$8,038 AUD
View
Price last confirmed 29 days ago
B
Retailer 17
-
$8,874 AUD
View
B
Retailer 18
-
$9,620 AUD
View
B
Retailer 19
-
$12,250 AUD
View
Most Expensive
B
MOH London
5528D845F · Nov 4
$12,526 AUD
£6,777 GBP
View
19 more retailers have this diamond
Prices start from $5,923 AUDSave up to $6,603 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
$5,923 AUD