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Marquise|Natural|IGI

0.51ct K SI1 Marquise Natural Diamond

VG • K/SI1 • IGI 741597178

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 741597178

Diamond specifications and retailer prices

From HK$2,069 HKD
As of November 6, 2026
Save HK$3,174 HKD (61%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: HK$6,669 HKD at MOH London · As of October 29, 2026
View at MOH London

About this 0.51ct natural marquise diamond

This 0.51ct 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 741597178. Listed at 6 retailers as of November 3, 2026, with a 153% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

0.51
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle32°
Pavilion angle41.8°
OriginNatural
Grading LabIGI
CertificateIGI 741597178
Dimensions7.75 × 4.25 × 2.71 mm
L/W Ratio1.82
Girdle conditionFaceted
Culet sizePointed
Top View
7.75 mm4.25 mm0.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 741597178
Side View
Table 61.0%Crown 32°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 63.8%

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: HK$6,669 HKD|Low: HK$2,069 HKD|High: HK$6,868 HKD|Avg: HK$4,365 HKD|-2.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 2HK$2,069 HKD
Retailer 3HK$3,832 HKD
Retailer 6HK$3,895 HKD
Retailer 4HK$4,452 HKD
Retailer 5HK$5,243 HKD
MOH LondonHK$6,669 HKD

39 data points across 6 retailers

6 retailersHK$2,069 HKD to HK$5,243 HKD

A
Cheapest Retailer
-
HK$2,069 HKD
B+
Retailer 2
-
HK$3,832 HKD
View
B+
Retailer 3
-
HK$3,895 HKD
View
B+
Retailer 4
-
HK$4,452 HKD
View
B
Retailer 5
-
HK$5,243 HKD
View
Most Expensive
MOH London
9579B6285 · Oct 29
HK$6,669 HKD
£670 GBP
View
Price last confirmed 8 days ago
5 more retailers have this diamond
Prices start from HK$2,069 HKDSave up to HK$3,174 HKD

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
0.51ct Marquise
HK$2,069 HKD