Marquise|Natural|GIA

0.50ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 2554995250

Certificate GIA 2554995250

Diamond specifications and retailer prices

From £439 GBP
As of October 30, 2026
18 retailers carry this diamond
Most expensive: £1,626 GBP at NZ Jewellers · As of October 27, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2554995250. Listed at 18 retailers as of October 27, 2026. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryGood
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2554995250
Dimensions8.03 × 4.05 × 2.62 mm
L/W Ratio1.98
Key to symbols
Feather, Crystal
Top View
8.03 mm4.05 mm0.50 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceFaint
CertificateGIA 2554995250
Side View
Table 57.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 64.6%

Caratlytics Score

No score right now
No retailer has confirmed this stone recently, so we are not scoring it. Prices below are as of the date shown.

Price History

Last verified: Oct 30
Current: £1,626 GBP|Low: £421 GBP|High: £1,626 GBP|Avg: £684 GBP|+3.6%
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 30, 2026
Retailer 3£439 GBP
Retailer 6£478 GBP
Retailer 17£518 GBP
Retailer 19£518 GBP
Retailer 7£523 GBP
Retailer 10£539 GBP
Retailer 18£539 GBP
Retailer 5£598 GBP
Retailer 16£598 GBP
Retailer 8£606 GBP
Retailer 9£617 GBP
Retailer 12£638 GBP
Retailer 13£640 GBP
Retailer 4£654 GBP
Retailer 15£736 GBP
Retailer 2£800 GBP
Retailer 11£807 GBP
Retailer 14£1,204 GBP
NZ Jewellers£1,626 GBP

26 data points across 19 retailers

18 retailers£439 GBP to £1,626 GBP

Retailer 1
-
£439 GBP
Price last confirmed 7 days ago
Retailer 2
-
£518 GBP
View
Price last confirmed 8 days ago
Retailer 3
-
£518 GBP
View
Price last confirmed 8 days ago
Retailer 4
-
£523 GBP
View
Price last confirmed 9 days ago
Retailer 5
-
£539 GBP
View
Price last confirmed 8 days ago
Retailer 6
-
£539 GBP
View
Price last confirmed 10 days ago
Retailer 7
-
£598 GBP
View
Price last confirmed 10 days ago
Retailer 8
-
£598 GBP
View
Price last confirmed 19 days ago
Retailer 9
-
£606 GBP
View
Price last confirmed 7 days ago
Retailer 10
-
£617 GBP
View
Price last confirmed 7 days ago
Retailer 11
-
£638 GBP
View
Price last confirmed 7 days ago
Retailer 12
-
£640 GBP
View
Price last confirmed 7 days ago
Retailer 13
-
£654 GBP
View
Price last confirmed 6 days ago
Retailer 14
-
£736 GBP
View
Price last confirmed 9 days ago
Retailer 15
-
£800 GBP
View
Price last confirmed 7 days ago
Retailer 16
-
£807 GBP
View
Price last confirmed 32 days ago
Retailer 17
-
£1,204 GBP
View
Price last confirmed 8 days ago
Most Expensive
NZ Jewellers
68b04a57-1884-4203-9656-3c71befe0aef · Oct 27
£1,626 GBP
$2,177 USD
View
Price under review
17 more retailers have this diamond

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.

0.50ct Marquise
£439 GBP