Cushion|Natural|GIA

0.51ct E SI1 Cushion Natural Diamond

VG • E/SI1 • GIA 1555383416

Certificate GIA 1555383416

Diamond specifications and retailer prices

From $448 USD
As of November 6, 2026
Save $737 USD (62%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,185 USD at MOH London · As of November 4, 2026
View at MOH London

About this 0.51ct natural cushion diamond

This 0.51ct natural cushion sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1555383416. Listed at 17 retailers as of November 4, 2026, with prices from $448 to $1,185, a $737 spread on the same certified stone. MOH London lists it at $1,185. 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

0.51
Carat
E
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1555383416
Dimensions5.31 × 4.24 × 2.92 mm
L/W Ratio1.25
Girdle conditionFaceted
Top View
5.31 mm4.24 mm0.51 ctE / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1555383416
Side View
Table 69.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 68.8%

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 6
Current: $1,185 USD|Low: $474 USD|High: $1,218 USD|Avg: $699 USD|-2.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 3$474 USD
Retailer 4$536 USD
Retailer 6$546 USD
Retailer 2$554 USD
Retailer 5$627 USD
Retailer 7$637 USD
Retailer 11$643 USD
Retailer 12$715 USD
Retailer 9$762 USD
Retailer 10$783 USD
Retailer 8$796 USD
MOH London$1,185 USD

27 data points across 12 retailers

17 retailers$448 USD to $1,185 USD

A
Cheapest Retailer
-
$448 USD
A
Retailer 2
-
$474 USD
View
Final sale: no returns
A
Retailer 3
-
$536 USD
View
A
Retailer 4
-
$546 USD
View
A
Retailer 5
-
$554 USD
View
B+
Retailer 6
-
$564 USD
View
B+
Retailer 7
-
$627 USD
View
B+
Retailer 8
-
$637 USD
View
Retailer 9
-
$643 USD
View
Price last confirmed 7 days ago
B+
Retailer 10
-
$715 USD
View
B+
Retailer 11
-
$742 USD
View
B
Retailer 12
-
$758 USD
View
B+
Retailer 13
-
$762 USD
View
B
Retailer 14
-
$783 USD
View
Retailer 15
-
$783 USD
View
Price last confirmed 34 days ago
B+
Retailer 16
-
$796 USD
View
Most Expensive
B
MOH London
99DB9A894 · Nov 4
$1,185 USD
£933 GBP
View
16 more retailers have this diamond
Prices start from $448 USDSave up to $737 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
0.51ct Cushion
$448 USD