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Marquise|Natural|GIA

0.50ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 1553995737

Certificate GIA 1553995737

Diamond specifications and retailer prices

From £343 GBP
HK$3,600 HKD
As of November 1, 2026
Save £941 GBP (73%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,285 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 1553995737. Listed at 14 retailers as of October 30, 2026, with prices from £343 to £1,285, a £941 spread on the same certified stone. NZ Jewellers lists it at £1,285. 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
SymmetryGood
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1553995737
Dimensions7.77 × 4.33 × 2.61 mm
L/W Ratio1.79
Key to symbols
Twinning Wisp, Feather
Top View
7.77 mm4.33 mm0.50 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryGood
FluorescenceMedium
CertificateGIA 1553995737
Side View
Table 62.0%CrownGirdle: STK-ETKPavilionCulet: NoneDepth 60.2%

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: £1,285 GBP|Low: £334 GBP|High: £1,285 GBP|Avg: £554 GBP|+3.7%
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
November 2, 2026
Retailer 3£343 GBP
Retailer 14£377 GBP
Retailer 11£410 GBP
Retailer 5£428 GBP
Retailer 12£441 GBP
Retailer 13£441 GBP
Retailer 6£472 GBP
Retailer 10£472 GBP
Retailer 2£489 GBP
Retailer 4£513 GBP
Retailer 7£517 GBP
Retailer 9£609 GBP
Retailer 8£946 GBP
NZ Jewellers£1,285 GBP

31 data points across 14 retailers

14 retailers£343 GBP to £1,285 GBP

A
Cheapest Retailer
-
£343 GBP
HK$3,600 HKD
B+
Retailer 2
-
£377 GBP
$506 USD
View
Final sale: no returns
A
Retailer 3
-
£410 GBP
$550 USD
View
B+
Retailer 4
-
£428 GBP
SGD 776 SGD
View
B+
Retailer 5
-
£441 GBP
$592 USD
View
A
Retailer 6
-
£441 GBP
$592 USD
View
B+
Retailer 7
-
£472 GBP
$634 USD
View
Retailer 8
-
£472 GBP
$634 USD
View
Price last confirmed 15 days ago
B+
Retailer 9
-
£489 GBP
View
B+
Retailer 10
-
£513 GBP
$688 USD
View
B+
Retailer 11
-
£517 GBP
View
B
Retailer 12
-
£609 GBP
€778 EUR
View
B
Retailer 13
-
£946 GBP
View
Most Expensive
B
NZ Jewellers
f71baf55-1e42-41d2-9725-8ffb66d927e9 · Oct 30
£1,285 GBP
$1,724 USD
View
13 more retailers have this diamond
Prices start from £343 GBPSave up to £941 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
£343 GBP