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Marquise|Natural|GIA

0.51ct I SI2 Marquise Natural Diamond

GD • I/SI2 • GIA 5546310673

Certificate GIA 5546310673

Diamond specifications and retailer prices

From $901 AUD
As of November 6, 2026
Save $1,230 AUD (58%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $3,655 AUD at NZ Jewellers · As of November 5, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 5546310673. Listed at 22 retailers as of November 4, 2026, with a 137% 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
I
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5546310673
Dimensions8.00 × 4.13 × 2.61 mm
L/W Ratio1.94
Top View
8.00 mm4.13 mm0.51 ctI / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 5546310673
Side View
Table 62.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 63.2%

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: Nov 6
Current: $1,384 AUD|Low: $901 AUD|High: $2,160 AUD|Avg: $1,416 AUD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5$901 AUD
Retailer 6$1,096 AUD
Retailer 7$1,208 AUD
Retailer 1$1,384 AUD
Retailer 2$1,387 AUD
Retailer 4$1,646 AUD
Retailer 3$2,131 AUD

44 data points across 7 retailers

22 retailers$901 AUD to $2,131 AUD

B+
Cheapest Retailer
-
$901 AUD
Final sale: no returns
B+
Retailer 2
-
$969 AUD
View
B+
Retailer 3
-
$1,055 AUD
View
Retailer 4
-
$1,055 AUD
View
Price last confirmed 9 days ago
B
Retailer 5
-
$1,068 AUD
View
B
Retailer 6
-
$1,096 AUD
View
B
Retailer 7
-
$1,103 AUD
View
B
Retailer 8
-
$1,199 AUD
View
B
Retailer 9
-
$1,208 AUD
View
B
Retailer 10
-
$1,211 AUD
View
B
Retailer 11
-
$1,218 AUD
View
B
Retailer 12
-
$1,300 AUD
View
B
Retailer 13
-
$1,310 AUD
View
B
Retailer 14
-
$1,310 AUD
View
B
Retailer 15
-
$1,354 AUD
View
B
Retailer 16
-
$1,384 AUD
View
B
Retailer 17
-
$1,387 AUD
View
B
Retailer 18
-
$1,426 AUD
View
B
Retailer 19
-
$1,646 AUD
View
C
Retailer 20
-
$1,872 AUD
View
C
Retailer 21
-
$2,131 AUD
View
Most Expensive
NZ Jewellers
24b02595-8c7f-485d-a676-2f1c4e4f1c4a · Nov 5
$3,655 AUD
$2,511 USD
View
Price under review
21 more retailers have this diamond
Prices start from $901 AUDSave up to $1,230 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
$901 AUD