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Marquise|Natural|GIA

0.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 7561579444

Certificate GIA 7561579444

Diamond specifications and retailer prices

From £322 GBP
$432 USD
As of November 2, 2026
Save £1,121 GBP (78%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,443 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 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 7561579444. Listed at 12 retailers as of October 30, 2026, with prices from £322 to £1,443, a £1,121 spread on the same certified stone. NZ Jewellers lists it at £1,443. 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
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 7561579444
Dimensions7.90 × 4.15 × 2.67 mm
L/W Ratio1.90
Girdle conditionVery Thick
Top View
7.90 mm4.15 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 7561579444
Side View
Table 60.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 64.4%

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: £1,443 GBP|Low: £322 GBP|High: £1,443 GBP|Avg: £649 GBP
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 4£322 GBP
Retailer 2£343 GBP
Retailer 12£425 GBP
Retailer 9£522 GBP
Retailer 11£554 GBP
Retailer 3£558 GBP
Retailer 5£565 GBP
Retailer 6£566 GBP
Retailer 7£679 GBP
Retailer 8£710 GBP
Retailer 10£1,064 GBP
NZ Jewellers£1,443 GBP

17 data points across 12 retailers

12 retailers£322 GBP to £1,443 GBP

A
Cheapest Retailer
-
£322 GBP
$432 USD
Final sale: no returns
A
Retailer 2
-
£343 GBP
₹43,858 INR
View
Retailer 3
-
£425 GBP
$570 USD
View
Price last confirmed 15 days ago
B+
Retailer 4
-
£522 GBP
$700 USD
View
B+
Retailer 5
-
£554 GBP
$744 USD
View
B+
Retailer 6
-
£558 GBP
$749 USD
View
B+
Retailer 7
-
£565 GBP
View
B+
Retailer 8
-
£566 GBP
View
B+
Retailer 9
-
£679 GBP
€868 EUR
View
B
Retailer 10
-
£710 GBP
ZAR 15,391 ZAR
View
Retailer 11
-
£1,064 GBP
View
Price last confirmed 7 days ago
Most Expensive
B
NZ Jewellers
32b23af8-fc48-47df-87b6-91c93d04c05e · Oct 30
£1,443 GBP
$1,936 USD
View
11 more retailers have this diamond
Prices start from £322 GBPSave up to £1,121 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
£322 GBP