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Marquise|Natural|IGI

3.51ct I SI1 Marquise Natural Diamond

VG • I/SI1 • IGI 828653006

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 828653006

Diamond specifications and retailer prices

From HK$248,012 HKD
₹3,010,439 INR
As of November 2, 2026
Save HK$169,542 HKD (41%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: HK$417,554 HKD at MOH London · As of November 1, 2026
View at MOH London

About this 3.51ct natural marquise diamond

This 3.51ct natural marquise sits in the three to five carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 828653006. Listed at 19 retailers as of November 1, 2026, with prices from HK$248,012 to HK$417,554, a HK$169,542 spread on the same certified stone. MOH London lists it at HK$417,554. 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

3.51
Carat
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle40.2°
OriginNatural
Grading LabIGI
CertificateIGI 828653006
Dimensions15.32 × 7.94 × 4.94 mm
L/W Ratio1.93
Girdle conditionFaceted
Culet sizeNone
Top View
15.32 mm7.94 mm3.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 828653006
Side View
Table 59.0%Crown 33.2°Girdle: ThickPavilion 40.2°Culet: NoneDepth 62.2%

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 2
Current: HK$417,554 HKD|Low: HK$247,512 HKD|High: HK$450,726 HKD|Avg: HK$310,797 HKD|-4.6%
MOH London
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
November 2, 2026
Retailer 2HK$248,012 HKD
Retailer 3HK$268,690 HKD
Retailer 15HK$270,518 HKD
Retailer 10HK$273,506 HKD
Retailer 6HK$278,505 HKD
Retailer 13HK$286,343 HKD
Retailer 8HK$296,996 HKD
Retailer 4HK$316,857 HKD
Retailer 12HK$319,713 HKD
Retailer 9HK$324,305 HKD
Retailer 11HK$328,579 HKD
Retailer 5HK$330,062 HKD
Retailer 7HK$332,008 HKD
Retailer 14HK$346,597 HKD
MOH LondonHK$417,554 HKD

20 data points across 15 retailers

19 retailersHK$248,012 HKD to HK$417,554 HKD

A
Cheapest Retailer
-
HK$248,012 HKD
₹3,010,439 INR
B+
Retailer 2
-
HK$268,690 HKD
$34,245 USD
View
A
Retailer 3
-
HK$270,518 HKD
$34,478 USD
View
Final sale: no returns
B+
Retailer 4
-
HK$273,506 HKD
£27,448 GBP
View
B+
Retailer 5
-
HK$278,505 HKD
$35,496 USD
View
B+
Retailer 6
-
HK$286,343 HKD
$36,495 USD
View
B+
Retailer 7
-
HK$296,996 HKD
£29,805 GBP
View
Retailer 8
-
HK$299,023 HKD
$38,111 USD
View
Price last confirmed 38 days ago
B+
Retailer 9
-
HK$316,857 HKD
$40,384 USD
View
Retailer 10
-
HK$317,118 HKD
$40,417 USD
View
Price last confirmed 12 days ago
B+
Retailer 11
-
HK$319,713 HKD
$40,748 USD
View
B+
Retailer 12
-
HK$324,305 HKD
€39,365 EUR
View
B+
Retailer 13
-
HK$328,579 HKD
$41,878 USD
View
B
Retailer 14
-
HK$330,062 HKD
$42,067 USD
View
B+
Retailer 15
-
HK$332,008 HKD
$42,315 USD
View
Retailer 16
-
HK$343,267 HKD
$43,750 USD
View
Price last confirmed 41 days ago
B+
Retailer 17
-
HK$346,597 HKD
ZAR 713,642 ZAR
View
Retailer 18
-
HK$356,472 HKD
$45,433 USD
View
Price last confirmed 39 days ago
Most Expensive
B
MOH London
CBBE91689 · Nov 1
HK$417,554 HKD
£41,904 GBP
View
18 more retailers have this diamond
Prices start from HK$248,012 HKDSave up to HK$169,542 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
3.51ct Marquise
HK$248,012 HKD