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Marquise|Natural|GIA

0.50ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 1558995545

Certificate GIA 1558995545

Diamond specifications and retailer prices

From £391 GBP
HK$4,100 HKD
As of November 1, 2026
Save £691 GBP (64%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,469 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 I 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 1558995545. Listed at 16 retailers as of November 1, 2026, with a 177% 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1558995545
Dimensions7.71 × 4.16 × 2.59 mm
L/W Ratio1.85
Key to symbols
Cloud, Crystal, Feather
Top View
7.71 mm4.16 mm0.50 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1558995545
Side View
Table 54.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 62.2%

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: £1,469 GBP|Low: £382 GBP|High: £1,469 GBP|Avg: £619 GBP|+3.2%
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 2, 2026
Retailer 4£391 GBP
Retailer 3£432 GBP
Retailer 12£468 GBP
Retailer 15£473 GBP
Retailer 7£488 GBP
Retailer 13£504 GBP
Retailer 14£504 GBP
Retailer 11£540 GBP
Retailer 2£559 GBP
Retailer 5£563 GBP
Retailer 6£567 GBP
Retailer 8£576 GBP
Retailer 10£689 GBP
Retailer 9£1,082 GBP
NZ Jewellers£1,469 GBP

31 data points across 15 retailers

16 retailers£391 GBP to £1,082 GBP

A
Cheapest Retailer
-
£391 GBP
HK$4,100 HKD
A
Retailer 2
-
£432 GBP
$580 USD
View
Final sale: no returns
A
Retailer 3
-
£468 GBP
$628 USD
View
B+
Retailer 4
-
£473 GBP
$635 USD
View
B+
Retailer 5
-
£488 GBP
SGD 885 SGD
View
B+
Retailer 6
-
£504 GBP
$677 USD
View
B+
Retailer 7
-
£504 GBP
$677 USD
View
B+
Retailer 8
-
£540 GBP
$725 USD
View
B+
Retailer 9
-
£559 GBP
View
B+
Retailer 10
-
£563 GBP
$755 USD
View
B+
Retailer 11
-
£567 GBP
$760 USD
View
B+
Retailer 12
-
£576 GBP
View
Retailer 13
-
£603 GBP
$809 USD
View
Price last confirmed 15 days ago
B
Retailer 14
-
£689 GBP
€881 EUR
View
B
Retailer 15
-
£1,082 GBP
View
Most Expensive
NZ Jewellers
0baf91a4-6fc7-42cc-8403-433606648c27 · Oct 30
£1,469 GBP
$1,971 USD
View
Price under review
15 more retailers have this diamond
Prices start from £391 GBPSave up to £691 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
£391 GBP