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Marquise|Natural|GIA

0.51ct E SI1 Marquise Natural Diamond

ID • E/SI1 • GIA 6552812953

Certificate GIA 6552812953

Diamond specifications and retailer prices

From $836 AUD
₹55,945 INR
As of October 31, 2026
Save $1,194 AUD (59%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $3,458 AUD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6552812953. Listed at 17 retailers as of October 29, 2026, with a 143% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
E
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552812953
Dimensions7.83 × 4.28 × 2.64 mm
L/W Ratio1.83
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
7.83 mm4.28 mm0.51 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552812953
Side View
Table 58.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 61.8%

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: Oct 31
Current: $836 AUD|Low: $789 AUD|High: $2,045 AUD|Avg: $1,238 AUD|-1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 1$836 AUD
Retailer 8$838 AUD
Retailer 6$1,016 AUD
Retailer 3$1,137 AUD
Retailer 2$1,325 AUD
Retailer 5$1,345 AUD
Retailer 7$1,658 AUD
Retailer 4$2,030 AUD

43 data points across 8 retailers

17 retailers$836 AUD to $2,030 AUD

A
Cheapest Retailer
-
$836 AUD
₹55,945 INR
A
Retailer 2
-
$838 AUD
HK$4,600 HKD
View
A
Retailer 3
-
$1,016 AUD
$714 USD
View
Final sale: no returns
Retailer 4
-
$1,103 AUD
$775 USD
View
Price last confirmed 15 days ago
Retailer 5
-
$1,103 AUD
$775 USD
View
Price last confirmed 11 days ago
A
Retailer 6
-
$1,119 AUD
$786 USD
View
A
Retailer 7
-
$1,137 AUD
$799 USD
View
Retailer 8
-
$1,145 AUD
$804 USD
View
Price last confirmed 14 days ago
A
Retailer 9
-
$1,166 AUD
SGD 1,107 SGD
View
Retailer 10
-
$1,273 AUD
$894 USD
View
Price last confirmed 12 days ago
B+
Retailer 11
-
$1,291 AUD
$907 USD
View
B+
Retailer 12
-
$1,325 AUD
£733 GBP
View
B+
Retailer 13
-
$1,345 AUD
$945 USD
View
B+
Retailer 14
-
$1,495 AUD
$1,050 USD
View
Retailer 15
-
$1,658 AUD
View
Price last confirmed 27 days ago
B
Retailer 16
-
$2,030 AUD
£1,123 GBP
View
Most Expensive
NZ Jewellers
ba939c1f-2809-4921-8d8e-37c312bb936f · Oct 17
$3,458 AUD
$2,429 USD
View
Price last confirmed 13 days ago
16 more retailers have this diamond
Prices start from $836 AUDSave up to $1,194 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 Marquise
$836 AUD