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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 $4,070 USD
As of November 1, 2026
Save $4,458 USD (52%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $8,528 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 6555305528. Listed at 20 retailers as of November 1, 2026, with prices from $4,070 to $8,528, a $4,458 spread on the same certified stone. MOH London lists it at $8,528. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $8,528 USD|Low: $4,024 USD|High: $8,838 USD|Avg: $5,350 USD|-3.5%
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 2, 2026
Retailer 3$4,070 USD
Retailer 2$4,070 USD
Retailer 16$4,291 USD
Retailer 9$4,513 USD
Retailer 14$4,530 USD
Retailer 4$4,535 USD
Retailer 6$4,572 USD
Retailer 10$4,650 USD
Retailer 18$4,736 USD
Retailer 17$4,820 USD
Retailer 13$4,855 USD
Retailer 11$5,141 USD
Retailer 15$5,286 USD
Retailer 7$5,307 USD
Retailer 12$6,130 USD
Retailer 5$6,699 USD
Retailer 8$8,464 USD
MOH London$8,528 USD

20 data points across 18 retailers

20 retailers$4,070 USD to $8,528 USD

A
Cheapest Retailer
-
$4,070 USD
A
Retailer 2
-
$4,070 USD
HK$31,800 HKD
View
B+
Retailer 3
-
$4,291 USD
View
B+
Retailer 4
-
$4,513 USD
View
B+
Retailer 5
-
$4,530 USD
View
Final sale: no returns
B+
Retailer 6
-
$4,535 USD
€4,319 EUR
View
B+
Retailer 7
-
$4,572 USD
View
B+
Retailer 8
-
$4,650 USD
View
B+
Retailer 9
-
$4,736 USD
A$7,287 AUD
View
B+
Retailer 10
-
$4,820 USD
View
B+
Retailer 11
-
$4,855 USD
View
B+
Retailer 12
-
$5,141 USD
£4,048 GBP
View
B
Retailer 13
-
$5,283 USD
A$8,128 AUD
View
B+
Retailer 14
-
$5,286 USD
£4,163 GBP
View
B
Retailer 15
-
$5,307 USD
View
Retailer 16
-
$5,524 USD
A$8,498 AUD
View
Price last confirmed 23 days ago
B
Retailer 17
-
$6,130 USD
€5,838 EUR
View
B
Retailer 18
-
$6,699 USD
ZAR 108,223 ZAR
View
Retailer 19
-
$8,464 USD
View
Price last confirmed 9 days ago
Most Expensive
B
MOH London
5528D845F · Nov 1
$8,528 USD
£6,715 GBP
View
19 more retailers have this diamond
Prices start from $4,070 USDSave up to $4,458 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
$4,070 USD