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Marquise|Natural|GIA

0.51ct G SI2 Marquise Natural Diamond

EX • G/SI2 • GIA 2554757133

Certificate GIA 2554757133

Diamond specifications and retailer prices

From $604 NZD
SGD 459 SGD
As of November 1, 2026
Save $774 NZD (56%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $1,378 NZD at Frank Darling · As of November 2, 2026
View at Frank Darling

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2554757133. Listed at 7 retailers as of November 1, 2026, with prices from $604 to $1,378, a $774 spread on the same certified stone. Frank Darling lists it at $1,378. 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
G
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2554757133
Dimensions7.70 × 4.13 × 2.70 mm
L/W Ratio1.86
Culet sizeNone
Top View
7.70 mm4.13 mm0.51 ctG / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 2554757133
Side View
Table 61.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 65.3%

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 1
Current: $1,378 NZD|Low: $441 NZD|High: $1,483 NZD|Avg: $898 NZD|-7.1%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 28, 2026
Retailer 8$441 NZD
Retailer 5$604 NZD
Retailer 4$614 NZD
Retailer 3$710 NZD
Retailer 2$785 NZD
Retailer 10$834 NZD
Retailer 6$929 NZD
Retailer 7$1,164 NZD
Retailer 9$1,174 NZD
Frank Darling$1,378 NZD

24 data points across 10 retailers

7 retailers$604 NZD to $1,378 NZD

A
Cheapest Retailer
-
$604 NZD
SGD 459 SGD
A
Retailer 2
-
$614 NZD
SGD 467 SGD
View
A
Retailer 3
-
$710 NZD
£314 GBP
View
A
Retailer 4
-
$785 NZD
$442 USD
View
A
Retailer 5
-
$834 NZD
$469 USD
View
A
Retailer 6
-
$929 NZD
$523 USD
View
Most Expensive
B+
Frank Darling
2665115HK · Nov 2
$1,378 NZD
$775 USD
View
6 more retailers have this diamond
Prices start from $604 NZDSave up to $774 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
$604 NZD