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Marquise|Natural|GIA

0.50ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 5566202579

Certificate GIA 5566202579

Diamond specifications and retailer prices

From £415 GBP
As of November 6, 2026
Save £995 GBP (71%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,411 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.5ct natural marquise diamond

This 0.5ct 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 5566202579. Listed at 16 retailers as of November 5, 2026, with prices from £415 to £1,411, a £995 spread on the same certified stone. NZ Jewellers lists it at £1,411. 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

0.50
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5566202579
Dimensions8.01 × 4.19 × 2.39 mm
L/W Ratio1.91
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal
Top View
8.01 mm4.19 mm0.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5566202579
Side View
Table 61.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 57.1%

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 6
Current: £1,411 GBP|Low: £415 GBP|High: £1,431 GBP|Avg: £625 GBP|-1.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 5£415 GBP
Retailer 7£426 GBP
Retailer 11£450 GBP
Retailer 3£459 GBP
Retailer 13£484 GBP
Retailer 4£485 GBP
Retailer 15£519 GBP
Retailer 10£547 GBP
Retailer 8£548 GBP
Retailer 2£548 GBP
Retailer 6£594 GBP
Retailer 9£661 GBP
Retailer 12£694 GBP
Retailer 14£1,037 GBP
NZ Jewellers£1,411 GBP

25 data points across 15 retailers

16 retailers£415 GBP to £1,411 GBP

A
Cheapest Retailer
-
£415 GBP
Final sale: no returns
A
Retailer 2
-
£426 GBP
View
A
Retailer 3
-
£450 GBP
View
Retailer 4
-
£459 GBP
View
Price last confirmed 9 days ago
A
Retailer 5
-
£484 GBP
View
Retailer 6
-
£485 GBP
View
Price last confirmed 8 days ago
B+
Retailer 7
-
£519 GBP
View
B+
Retailer 8
-
£547 GBP
View
B+
Retailer 9
-
£548 GBP
View
B+
Retailer 10
-
£548 GBP
View
B
Retailer 11
-
£594 GBP
View
B+
Retailer 12
-
£661 GBP
View
B+
Retailer 13
-
£694 GBP
View
Retailer 14
-
£699 GBP
View
Price last confirmed 32 days ago
B
Retailer 15
-
£1,037 GBP
View
Most Expensive
B
NZ Jewellers
5f9e60fc-e73c-476b-a924-7d86aaa3e94e · Nov 5
£1,411 GBP
$1,888 USD
View
15 more retailers have this diamond
Prices start from £415 GBPSave up to £995 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
0.50ct Marquise
£415 GBP