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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 £253 GBP
SGD 459 SGD
As of November 1, 2026
Save £325 GBP (56%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £579 GBP 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 £253 to £579, a £325 spread on the same certified stone. Frank Darling lists it at £579. 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: £579 GBP|Low: £185 GBP|High: £623 GBP|Avg: £377 GBP|-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£185 GBP
Retailer 5£253 GBP
Retailer 4£258 GBP
Retailer 3£298 GBP
Retailer 2£330 GBP
Retailer 10£350 GBP
Retailer 6£390 GBP
Retailer 7£489 GBP
Retailer 9£493 GBP
Frank Darling£579 GBP

24 data points across 10 retailers

7 retailers£253 GBP to £579 GBP

A
Cheapest Retailer
-
£253 GBP
SGD 459 SGD
A
Retailer 2
-
£258 GBP
SGD 467 SGD
View
A
Retailer 3
-
£298 GBP
View
A
Retailer 4
-
£330 GBP
$442 USD
View
A
Retailer 5
-
£350 GBP
$469 USD
View
A
Retailer 6
-
£390 GBP
$523 USD
View
Most Expensive
B+
Frank Darling
2665115HK · Nov 2
£579 GBP
$775 USD
View
6 more retailers have this diamond
Prices start from £253 GBPSave up to £325 GBP

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
£253 GBP