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Marquise|Natural|GIA

0.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 3555975462

Certificate GIA 3555975462

Diamond specifications and retailer prices

From $755 NZD
$425 USD
As of November 2, 2026
Save $2,458 NZD (76%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,213 NZD 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 3555975462. Listed at 12 retailers as of October 30, 2026, with prices from $755 to $3,213, a $2,458 spread on the same certified stone. NZ Jewellers lists it at $3,213. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 3555975462
Dimensions4.06 × 9.29 × 2.43 mm
L/W Ratio2.29
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal
Top View
4.06 mm9.29 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 3555975462
Side View
Table 63.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 59.9%

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: Nov 2
Current: $3,213 NZD|Low: $741 NZD|High: $3,434 NZD|Avg: $1,189 NZD|-6.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 8$755 NZD
Retailer 9$819 NZD
Retailer 2$882 NZD
Retailer 3$903 NZD
Retailer 12$915 NZD
Retailer 5$946 NZD
Retailer 10$946 NZD
Retailer 11$960 NZD
Retailer 6$1,005 NZD
Retailer 7$1,020 NZD
Retailer 4$1,347 NZD
NZ Jewellers$3,213 NZD

35 data points across 12 retailers

12 retailers$755 NZD to $3,213 NZD

A
Cheapest Retailer
-
$755 NZD
$425 USD
Final sale: no returns
A
Retailer 2
-
$819 NZD
$461 USD
View
A
Retailer 3
-
$882 NZD
$496 USD
View
A
Retailer 4
-
$903 NZD
$508 USD
View
A
Retailer 5
-
$915 NZD
SGD 696 SGD
View
A
Retailer 6
-
$946 NZD
$532 USD
View
A
Retailer 7
-
$946 NZD
$532 USD
View
A
Retailer 8
-
$960 NZD
$540 USD
View
A
Retailer 9
-
$1,005 NZD
£445 GBP
View
A
Retailer 10
-
$1,020 NZD
£452 GBP
View
Retailer 11
-
$1,347 NZD
A$1,166 AUD
View
Price last confirmed 29 days ago
Most Expensive
B
NZ Jewellers
88376718-b8b2-4f68-9965-981372ec3c26 · Oct 30
$3,213 NZD
$1,808 USD
View
11 more retailers have this diamond
Prices start from $755 NZDSave up to $2,458 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.

A
0.51ct Marquise
$755 NZD