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Marquise|Natural|GIA

0.51ct E SI1 Marquise Natural Diamond

VG • E/SI1 • GIA 6545062248

Certificate GIA 6545062248

Diamond specifications and retailer prices

From $1,227 AUD
$862 USD
As of October 30, 2026
Save $1,774 AUD (59%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $4,314 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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 6545062248. Listed at 18 retailers as of October 28, 2026, with a 145% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.73°
Pavilion angle41.46°
OriginNatural
Grading LabGIA
CertificateGIA 6545062248
Dimensions7.69 × 4.12 × 2.70 mm
L/W Ratio1.87
Top View
7.69 mm4.12 mm0.51 ctE / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6545062248
Side View
Table 61.0%Crown 40.73°Girdle: MED-VTKPavilion 41.46°Culet: NoneDepth 65.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $1,611 AUD|Low: $1,270 AUD|High: $3,010 AUD|Avg: $2,012 AUD|+4.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 8$1,270 AUD
Retailer 7$1,587 AUD
Retailer 1$1,611 AUD
Retailer 4$1,654 AUD
Retailer 2$1,936 AUD
Retailer 9$2,069 AUD
Retailer 3$2,124 AUD
Retailer 6$2,464 AUD
Retailer 5$3,001 AUD

38 data points across 9 retailers

18 retailers$1,227 AUD to $3,001 AUD

B+
Cheapest Retailer
-
$1,227 AUD
$862 USD
B+
Retailer 2
-
$1,270 AUD
$892 USD
View
Final sale: no returns
B+
Retailer 3
-
$1,347 AUD
$946 USD
View
Retailer 4
-
$1,375 AUD
$966 USD
View
Price last confirmed 15 days ago
Retailer 5
-
$1,375 AUD
$966 USD
View
Price last confirmed 11 days ago
Retailer 6
-
$1,429 AUD
$1,004 USD
View
Price last confirmed 14 days ago
B
Retailer 7
-
$1,566 AUD
$1,100 USD
View
Retailer 8
-
$1,587 AUD
$1,115 USD
View
Price last confirmed 60 days ago
B
Retailer 9
-
$1,587 AUD
$1,115 USD
View
Retailer 10
-
$1,587 AUD
$1,115 USD
View
Price last confirmed 12 days ago
B+
Retailer 11
-
$1,611 AUD
£891 GBP
View
B+
Retailer 12
-
$1,654 AUD
£915 GBP
View
B
Retailer 13
-
$1,936 AUD
€1,295 EUR
View
Retailer 14
-
$2,069 AUD
View
Price last confirmed 26 days ago
B
Retailer 15
-
$2,124 AUD
ZAR 24,099 ZAR
View
B
Retailer 16
-
$2,464 AUD
£1,363 GBP
View
B
Retailer 17
-
$3,001 AUD
£1,660 GBP
View
Most Expensive
NZ Jewellers
8972141a-a417-4250-8f54-dbca49b1ad38 · Oct 17
$4,314 AUD
$3,030 USD
View
Price under review
17 more retailers have this diamond
Prices start from $1,227 AUDSave up to $1,774 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.

B+
0.51ct Marquise
$1,227 AUD