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Marquise|Natural|IGI

0.50ct K SI1 Marquise Natural Diamond

VG • K/SI1 • IGI 844664721

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 844664721

Diamond specifications and retailer prices

From £315 GBP
As of October 31, 2026
Save £71 GBP (18%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £510 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 0.5ct natural marquise diamond

This 0.5ct natural marquise sits in the half to three-quarter carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 844664721. Listed at 4 retailers as of October 31, 2026, with a relatively tight 22% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
Crown angle28.5°
Pavilion angle41.4°
OriginNatural
Grading LabIGI
CertificateIGI 844664721
Dimensions9.08 × 3.78 × 2.57 mm
L/W Ratio2.40
Girdle conditionFaceted
Top View
9.08 mm3.78 mm0.50 ctK / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateIGI 844664721
Side View
Table 51.0%Crown 28.5°Girdle: STK-VTKPavilion 41.4°Culet: NoneDepth 68.0%

Caratlytics Score

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

Price History

Last verified: Oct 31
Current: £510 GBP|Low: £315 GBP|High: £510 GBP|Avg: £408 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
November 2, 2026
Retailer 3£315 GBP
Retailer 4£338 GBP
Retailer 2£386 GBP
MOH London£510 GBP

8 data points across 4 retailers

4 retailers£315 GBP to £386 GBP

B+
Cheapest Retailer
-
£315 GBP
B+
Retailer 2
-
£338 GBP
View
B+
Retailer 3
-
£386 GBP
View
Most Expensive
MOH London
9C8E819AE · Oct 29
£510 GBP
View
Price last confirmed 8 days ago
3 more retailers have this diamond
Prices start from £315 GBPSave up to £71 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
£315 GBP