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Marquise|Natural|GIA

0.50ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 6555338540

Certificate GIA 6555338540

Diamond specifications and retailer prices

From £480 GBP
As of November 6, 2026
Save £722 GBP (60%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,635 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 6555338540. Listed at 16 retailers as of November 4, 2026, with a 150% 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

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

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle33.34°
OriginNatural
Grading LabGIA
CertificateGIA 6555338540
Dimensions8.34 × 4.09 × 2.57 mm
L/W Ratio2.04
Culet sizeNone
Key to symbols
Feather
Top View
8.34 mm4.09 mm0.50 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6555338540
Side View
Table 61.0%Crown 33.34°GirdlePavilionCulet: NoneDepth 62.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £637 GBP|Low: £441 GBP|High: £1,218 GBP|Avg: £686 GBP|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 9£480 GBP
Retailer 11£493 GBP
Retailer 2£542 GBP
Retailer 3£608 GBP
Retailer 4£620 GBP
Retailer 1£637 GBP
Retailer 5£637 GBP
Retailer 10£657 GBP
Retailer 8£738 GBP
Retailer 12£784 GBP
Retailer 6£805 GBP
Retailer 7£1,202 GBP

38 data points across 12 retailers

16 retailers£480 GBP to £1,202 GBP

B+
Cheapest Retailer
-
£480 GBP
Final sale: no returns
B+
Retailer 2
-
£493 GBP
View
Retailer 3
-
£521 GBP
View
Price last confirmed 8 days ago
B+
Retailer 4
-
£521 GBP
View
B+
Retailer 5
-
£542 GBP
View
B+
Retailer 6
-
£601 GBP
View
B
Retailer 7
-
£608 GBP
View
B
Retailer 8
-
£620 GBP
View
B
Retailer 9
-
£637 GBP
View
B
Retailer 10
-
£637 GBP
View
B
Retailer 11
-
£657 GBP
View
B
Retailer 12
-
£738 GBP
View
Retailer 13
-
£784 GBP
View
Price last confirmed 33 days ago
B
Retailer 14
-
£805 GBP
View
B
Retailer 15
-
£1,202 GBP
View
Most Expensive
NZ Jewellers
24905fea-0709-49c9-a767-e1aae4dd5287 · Nov 5
£1,635 GBP
$2,189 USD
View
Price under review
15 more retailers have this diamond
Prices start from £480 GBPSave up to £722 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.

B+
0.50ct Marquise
£480 GBP