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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 $1,117 NZD
As of November 6, 2026
Save $1,524 NZD (58%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $4,530 NZD 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: $1,716 NZD|Low: $1,117 NZD|High: $2,677 NZD|Avg: $1,755 NZD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5$1,117 NZD
Retailer 6$1,358 NZD
Retailer 7$1,497 NZD
Retailer 1$1,716 NZD
Retailer 2$1,719 NZD
Retailer 4$2,040 NZD
Retailer 3$2,641 NZD

44 data points across 7 retailers

22 retailers$1,117 NZD to $2,641 NZD

B+
Cheapest Retailer
-
$1,117 NZD
Final sale: no returns
B+
Retailer 2
-
$1,201 NZD
View
B+
Retailer 3
-
$1,308 NZD
View
Retailer 4
-
$1,308 NZD
View
Price last confirmed 9 days ago
B
Retailer 5
-
$1,324 NZD
View
B
Retailer 6
-
$1,358 NZD
View
B
Retailer 7
-
$1,367 NZD
View
B
Retailer 8
-
$1,486 NZD
View
B
Retailer 9
-
$1,497 NZD
View
B
Retailer 10
-
$1,501 NZD
View
B
Retailer 11
-
$1,510 NZD
View
B
Retailer 12
-
$1,611 NZD
View
B
Retailer 13
-
$1,624 NZD
View
B
Retailer 14
-
$1,624 NZD
View
B
Retailer 15
-
$1,678 NZD
View
B
Retailer 16
-
$1,716 NZD
View
B
Retailer 17
-
$1,719 NZD
View
B
Retailer 18
-
$1,768 NZD
View
B
Retailer 19
-
$2,040 NZD
View
C
Retailer 20
-
$2,320 NZD
View
C
Retailer 21
-
$2,641 NZD
View
Most Expensive
NZ Jewellers
24b02595-8c7f-485d-a676-2f1c4e4f1c4a · Nov 5
$4,530 NZD
$2,511 USD
View
Price under review
21 more retailers have this diamond
Prices start from $1,117 NZDSave up to $1,524 NZD

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
$1,117 NZD