Cushion|Natural|GIA

0.51ct I SI1 Cushion Natural Diamond

VG • I/SI1 • GIA 1549165866

Certificate GIA 1549165866

Diamond specifications and retailer prices

From $282 USD
₹26,875 INR
As of November 1, 2026
Save $616 USD (69%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $898 USD at MOH London · As of October 29, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1549165866. Listed at 8 retailers as of October 29, 2026, with prices from $282 to $898, a $616 spread on the same certified stone. MOH London lists it at $898. 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
I
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 1549165866
Dimensions4.63 × 4.51 × 3.00 mm
L/W Ratio1.03
Girdle conditionFaceted
Key to symbols
Feather, Crystal
Top View
4.63 mm4.51 mm0.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 1549165866
Side View
Table 58.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 66.6%

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 1
Current: $898 USD|Low: $282 USD|High: $904 USD|Avg: $593 USD|-0.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 3$282 USD
Retailer 2$505 USD
Retailer 5$597 USD
Retailer 6$600 USD
Retailer 7$620 USD
Retailer 4$705 USD
MOH London$898 USD

37 data points across 7 retailers

8 retailers$282 USD to $898 USD

A
Cheapest Retailer
-
$282 USD
₹26,875 INR
B+
Retailer 2
-
$425 USD
View
B+
Retailer 3
-
$505 USD
£397 GBP
View
B+
Retailer 4
-
$597 USD
ZAR 9,644 ZAR
View
B
Retailer 5
-
$600 USD
View
Retailer 6
-
$620 USD
A$953 AUD
View
Price last confirmed 29 days ago
B
Retailer 7
-
$705 USD
€671 EUR
View
Most Expensive
B
MOH London
BED87C1C3 · Oct 29
$898 USD
£707 GBP
View
7 more retailers have this diamond
Prices start from $282 USDSave up to $616 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
$282 USD