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Marquise|Natural|GIA

0.50ct H SI2 Marquise Natural Diamond

EX • H/SI2 • GIA 6545535409

Certificate GIA 6545535409

Diamond specifications and retailer prices

From £382 GBP
HK$4,000 HKD
As of November 1, 2026
Save £670 GBP (64%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,428 GBP at NZ Jewellers · As of October 30, 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 H 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 6545535409. Listed at 14 retailers as of November 1, 2026, with a 176% 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
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6545535409
Dimensions8.48 × 4.04 × 2.45 mm
L/W Ratio2.10
Top View
8.48 mm4.04 mm0.50 ctH / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6545535409
Side View
Table 58.0%CrownGirdle: Very ThickPavilionCulet: NDepth 60.6%

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: £1,428 GBP|Low: £420 GBP|High: £1,428 GBP|Avg: £626 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 3£420 GBP
Retailer 12£455 GBP
Retailer 10£490 GBP
Retailer 11£490 GBP
Retailer 8£525 GBP
Retailer 2£544 GBP
Retailer 4£551 GBP
Retailer 6£560 GBP
Retailer 9£571 GBP
Retailer 5£671 GBP
Retailer 7£1,051 GBP
NZ Jewellers£1,428 GBP

33 data points across 12 retailers

14 retailers£382 GBP to £1,051 GBP

A
Cheapest Retailer
-
£382 GBP
HK$4,000 HKD
A
Retailer 2
-
£420 GBP
$563 USD
View
Final sale: no returns
B+
Retailer 3
-
£455 GBP
$611 USD
View
B+
Retailer 4
-
£490 GBP
$658 USD
View
B+
Retailer 5
-
£490 GBP
$658 USD
View
B+
Retailer 6
-
£525 GBP
$705 USD
View
B+
Retailer 7
-
£525 GBP
$705 USD
View
B+
Retailer 8
-
£544 GBP
View
B+
Retailer 9
-
£551 GBP
$740 USD
View
B+
Retailer 10
-
£560 GBP
View
B+
Retailer 11
-
£571 GBP
View
B
Retailer 12
-
£671 GBP
€858 EUR
View
B
Retailer 13
-
£1,051 GBP
View
Most Expensive
NZ Jewellers
3393a178-b7b2-47be-8ba7-0a0ae1ddd652 · Oct 30
£1,428 GBP
$1,916 USD
View
Price under review
13 more retailers have this diamond
Prices start from £382 GBPSave up to £670 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
£382 GBP