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Cushion|Natural|GIA

0.51ct I SI1 Cushion Natural Diamond

VG • I/SI1 • GIA 1549165866

Certificate GIA 1549165866

Diamond specifications and retailer prices

From $403 AUD
₹26,866 INR
As of November 2, 2026
Save $871 AUD (68%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,274 AUD at MOH London · As of November 2, 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 November 2, 2026, with prices from $403 to $1,274, a $871 spread on the same certified stone. MOH London lists it at $1,274. 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
Colour
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 2
Current: $1,274 AUD|Low: $402 AUD|High: $1,290 AUD|Avg: $848 AUD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 3, 2026
Retailer 3$403 AUD
Retailer 2$720 AUD
Retailer 5$852 AUD
Retailer 6$856 AUD
Retailer 7$884 AUD
Retailer 4$1,005 AUD
MOH London$1,274 AUD

37 data points across 7 retailers

8 retailers$403 AUD to $1,274 AUD

A
Cheapest Retailer
-
$403 AUD
₹26,866 INR
B+
Retailer 2
-
$606 AUD
$425 USD
View
B+
Retailer 3
-
$720 AUD
£397 GBP
View
B+
Retailer 4
-
$852 AUD
ZAR 9,644 ZAR
View
B
Retailer 5
-
$856 AUD
$600 USD
View
Retailer 6
-
$884 AUD
View
Price last confirmed 30 days ago
B
Retailer 7
-
$1,005 AUD
€671 EUR
View
Most Expensive
B
MOH London
BED87C1C3 · Nov 2
$1,274 AUD
£703 GBP
View
7 more retailers have this diamond
Prices start from $403 AUDSave up to $871 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
0.51ct Cushion
$403 AUD