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Marquise|Natural|GIA

0.50ct I SI2 Marquise Natural Diamond

GD • I/SI2 • GIA 2566502812

Certificate GIA 2566502812

Diamond specifications and retailer prices

From £382 GBP
HK$4,000 HKD
As of November 1, 2026
Save £247 GBP (39%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £628 GBP at Yorxs · As of November 2, 2026
View at Yorxs

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 standard cut grade stated by the retailer rather than the lab and certified by GIA 2566502812. Listed at 6 retailers as of November 1, 2026, with prices from £382 to £628, a £247 spread on the same certified stone. Yorxs lists it at £628. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.50
Carat
I
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2566502812
Dimensions8.29 × 3.99 × 2.59 mm
L/W Ratio2.08
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp
Top View
8.29 mm3.99 mm0.50 ctI / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566502812
Side View
Table 57.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 64.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £455 GBP|Low: £382 GBP|High: £628 GBP|Avg: £476 GBP|-1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Yorxs
November 2, 2026
Retailer 2£382 GBP
Retailer 4£422 GBP
Retailer 1£455 GBP
Retailer 3£473 GBP
Yorxs£628 GBP

8 data points across 5 retailers

6 retailers£382 GBP to £628 GBP

B+
Cheapest Retailer
-
£382 GBP
HK$4,000 HKD
B+
Retailer 2
-
£422 GBP
$566 USD
View
Final sale: no returns
Retailer 3
-
£454 GBP
SGD 824 SGD
View
Price last confirmed 13 days ago
B+
Retailer 4
-
£455 GBP
$610 USD
View
Retailer 5
-
£473 GBP
SGD 857 SGD
View
Price last confirmed 12 days ago
Most Expensive
B
Yorxs
622888414 · Nov 2
£628 GBP
€803 EUR
View
5 more retailers have this diamond
Prices start from £382 GBPSave up to £247 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.

B+
0.50ct Marquise
£382 GBP