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Marquise|Natural|GIA

0.51ct F SI2 Marquise Natural Diamond

EX • F/SI2 • GIA 1568415063

Certificate GIA 1568415063

Diamond specifications and retailer prices

From £388 GBP
$521 USD
As of November 2, 2026
Save £620 GBP (61%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,725 GBP 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 F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1568415063. Listed at 11 retailers as of November 1, 2026, with a 160% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
F
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1568415063
Dimensions7.96 × 4.17 × 2.63 mm
L/W Ratio1.91
Girdle conditionVery Thick
Top View
7.96 mm4.17 mm0.51 ctF / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1568415063
Side View
Table 56.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 63.0%

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: £1,725 GBP|Low: £388 GBP|High: £1,725 GBP|Avg: £733 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 10£388 GBP
Retailer 4£413 GBP
Retailer 7£503 GBP
Retailer 8£559 GBP
Retailer 9£649 GBP
Retailer 3£655 GBP
Retailer 2£657 GBP
Retailer 6£780 GBP
Retailer 5£1,008 GBP
NZ Jewellers£1,725 GBP

30 data points across 10 retailers

11 retailers£388 GBP to £1,008 GBP

A
Cheapest Retailer
-
£388 GBP
$521 USD
Final sale: no returns
A
Retailer 2
-
£413 GBP
₹52,799 INR
View
Retailer 3
-
£503 GBP
$675 USD
View
Price last confirmed 15 days ago
B+
Retailer 4
-
£559 GBP
$750 USD
View
B+
Retailer 5
-
£633 GBP
$849 USD
View
B+
Retailer 6
-
£649 GBP
$871 USD
View
B+
Retailer 7
-
£655 GBP
View
B+
Retailer 8
-
£657 GBP
View
B+
Retailer 9
-
£780 GBP
€997 EUR
View
B
Retailer 10
-
£1,008 GBP
View
Most Expensive
NZ Jewellers
90ecfe96-ec6a-4556-8cca-2b43e5702c51 · Oct 30
£1,725 GBP
$2,315 USD
View
Price under review
10 more retailers have this diamond
Prices start from £388 GBPSave up to £620 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
£388 GBP