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Marquise|Natural|GIA

0.51ct E SI1 Marquise Natural Diamond

ID • E/SI1 • GIA 6532891205

Certificate GIA 6532891205

Diamond specifications and retailer prices

From $1,120 AUD
$787 USD
As of October 31, 2026
Save $1,528 AUD (58%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $3,508 AUD at NZ Jewellers · As of October 30, 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 6532891205. Listed at 25 retailers as of October 29, 2026, with a 136% 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
SymmetryVery Good
FluorescenceNone
Pavilion angle42.2°
OriginNatural
Grading LabGIA
CertificateGIA 6532891205
Dimensions8.19 × 4.21 × 2.62 mm
L/W Ratio1.95
Top View
8.19 mm4.21 mm0.51 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6532891205
Side View
Table 61.0%CrownGirdle: MED-VTKPavilion 42.2°Culet: NoneDepth 62.2%

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: $3,508 AUD|Low: $1,120 AUD|High: $3,508 AUD|Avg: $1,811 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 10$1,120 AUD
Retailer 13$1,294 AUD
Retailer 4$1,303 AUD
Retailer 5$1,303 AUD
Retailer 12$1,352 AUD
Retailer 3$1,503 AUD
Retailer 9$1,523 AUD
Retailer 2$1,686 AUD
Retailer 11$1,881 AUD
Retailer 6$2,021 AUD
Retailer 7$2,220 AUD
Retailer 8$2,649 AUD
NZ Jewellers$3,508 AUD

45 data points across 13 retailers

25 retailers$1,120 AUD to $2,649 AUD

A
Cheapest Retailer
-
$1,120 AUD
$787 USD
Final sale: no returns
B+
Retailer 2
-
$1,206 AUD
$847 USD
View
B+
Retailer 3
-
$1,278 AUD
$898 USD
View
B+
Retailer 4
-
$1,290 AUD
$906 USD
View
B+
Retailer 5
-
$1,294 AUD
$909 USD
View
B+
Retailer 6
-
$1,301 AUD
View
B+
Retailer 7
-
$1,303 AUD
$915 USD
View
B+
Retailer 8
-
$1,303 AUD
$915 USD
View
B+
Retailer 9
-
$1,318 AUD
$926 USD
View
B+
Retailer 10
-
$1,352 AUD
$950 USD
View
B+
Retailer 11
-
$1,445 AUD
$1,015 USD
View
B+
Retailer 12
-
$1,503 AUD
$1,056 USD
View
B
Retailer 13
-
$1,523 AUD
$1,070 USD
View
B+
Retailer 14
-
$1,594 AUD
$1,120 USD
View
B+
Retailer 15
-
$1,594 AUD
$1,120 USD
View
B+
Retailer 16
-
$1,617 AUD
$1,136 USD
View
B+
Retailer 17
-
$1,637 AUD
$1,150 USD
View
B+
Retailer 18
-
$1,686 AUD
£933 GBP
View
B
Retailer 19
-
$1,775 AUD
$1,247 USD
View
Retailer 20
-
$1,881 AUD
View
Price last confirmed 27 days ago
B
Retailer 21
-
$2,021 AUD
€1,352 EUR
View
B
Retailer 22
-
$2,220 AUD
ZAR 25,195 ZAR
View
B
Retailer 23
-
$2,329 AUD
CA$2,272 CAD
View
B
Retailer 24
-
$2,649 AUD
£1,465 GBP
View
Most Expensive
NZ Jewellers
55f901b7-fcb2-4052-92d0-b6ae44ff6f1d · Oct 30
$3,508 AUD
$2,464 USD
View
Price under review
24 more retailers have this diamond
Prices start from $1,120 AUDSave up to $1,528 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
$1,120 AUD