Marquise|Natural|GIA

0.50ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 2556419943

Certificate GIA 2556419943

Diamond specifications and retailer prices

From £371 GBP
As of November 6, 2026
Save £1,213 GBP (77%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £1,584 GBP at NZ Jewellers · As of October 17, 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556419943. Listed at 24 retailers as of November 5, 2026, with a 327% 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556419943
Dimensions7.48 × 4.19 × 2.73 mm
L/W Ratio1.79
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Indented Natural
Top View
7.48 mm4.19 mm0.50 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2556419943
Side View
Table 59.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 65.1%

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 6
Current: £371 GBP|Low: £371 GBP|High: £1,177 GBP|Avg: £658 GBP|-2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 1£371 GBP
Retailer 10£465 GBP
Retailer 7£505 GBP
Retailer 8£508 GBP
Retailer 4£616 GBP
Retailer 9£643 GBP
Retailer 3£715 GBP
Retailer 2£759 GBP
Retailer 5£779 GBP
Retailer 6£1,165 GBP

37 data points across 10 retailers

24 retailers£371 GBP to £1,584 GBP

A
Cheapest Retailer
-
£371 GBP
A
Retailer 2
-
£465 GBP
View
Final sale: no returns
A
Retailer 3
-
£478 GBP
View
Retailer 4
-
£505 GBP
View
Price last confirmed 39 days ago
Retailer 5
-
£505 GBP
View
Price last confirmed 8 days ago
Retailer 6
-
£505 GBP
View
Price last confirmed 19 days ago
Retailer 7
-
£505 GBP
View
Price last confirmed 8 days ago
Retailer 8
-
£505 GBP
View
Price last confirmed 21 days ago
A
Retailer 9
-
£508 GBP
View
Retailer 10
-
£524 GBP
View
Price last confirmed 20 days ago
Retailer 11
-
£583 GBP
View
Price last confirmed 38 days ago
Retailer 12
-
£583 GBP
View
Price last confirmed 28 days ago
B+
Retailer 13
-
£604 GBP
View
B+
Retailer 14
-
£616 GBP
View
B+
Retailer 15
-
£643 GBP
View
Retailer 16
-
£653 GBP
View
Price last confirmed 41 days ago
B+
Retailer 17
-
£693 GBP
View
B+
Retailer 18
-
£715 GBP
View
Retailer 19
-
£759 GBP
View
Price last confirmed 33 days ago
B+
Retailer 20
-
£779 GBP
View
B
Retailer 21
-
£1,165 GBP
View
Retailer 22
-
£1,584 GBP
View
Price last confirmed 39 days ago
B
Retailer 23
-
£1,584 GBP
View
Most Expensive
NZ Jewellers
4efd96dc-3d7a-453b-89aa-88280ee104e8 · Oct 17
£1,584 GBP
$2,120 USD
View
Price last confirmed 19 days ago
23 more retailers have this diamond
Prices start from £371 GBPSave up to £1,213 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
£371 GBP