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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 $40,410 SGD
₹3,010,439 INR
As of November 2, 2026
Save $27,624 SGD (41%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $68,034 SGD 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 $40,410 to $68,034, a $27,624 spread on the same certified stone. MOH London lists it at $68,034. 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: $68,034 SGD|Low: $40,328 SGD|High: $73,439 SGD|Avg: $50,639 SGD|-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 2$40,410 SGD
Retailer 3$43,779 SGD
Retailer 15$44,077 SGD
Retailer 10$44,564 SGD
Retailer 6$45,378 SGD
Retailer 13$46,655 SGD
Retailer 8$48,391 SGD
Retailer 4$51,627 SGD
Retailer 12$52,092 SGD
Retailer 9$52,840 SGD
Retailer 11$53,537 SGD
Retailer 5$53,778 SGD
Retailer 7$54,095 SGD
Retailer 14$56,473 SGD
MOH London$68,034 SGD

20 data points across 15 retailers

19 retailers$40,410 SGD to $68,034 SGD

A
Cheapest Retailer
-
$40,410 SGD
₹3,010,439 INR
B+
Retailer 2
-
$43,779 SGD
$34,245 USD
View
A
Retailer 3
-
$44,077 SGD
$34,478 USD
View
Final sale: no returns
B+
Retailer 4
-
$44,564 SGD
£27,448 GBP
View
B+
Retailer 5
-
$45,378 SGD
$35,496 USD
View
B+
Retailer 6
-
$46,655 SGD
$36,495 USD
View
B+
Retailer 7
-
$48,391 SGD
£29,805 GBP
View
Retailer 8
-
$48,721 SGD
$38,111 USD
View
Price last confirmed 38 days ago
B+
Retailer 9
-
$51,627 SGD
$40,384 USD
View
Retailer 10
-
$51,670 SGD
$40,417 USD
View
Price last confirmed 12 days ago
B+
Retailer 11
-
$52,092 SGD
$40,748 USD
View
B+
Retailer 12
-
$52,840 SGD
€39,365 EUR
View
B+
Retailer 13
-
$53,537 SGD
$41,878 USD
View
B
Retailer 14
-
$53,778 SGD
$42,067 USD
View
B+
Retailer 15
-
$54,095 SGD
$42,315 USD
View
Retailer 16
-
$55,930 SGD
$43,750 USD
View
Price last confirmed 41 days ago
B+
Retailer 17
-
$56,473 SGD
ZAR 713,642 ZAR
View
Retailer 18
-
$58,082 SGD
$45,433 USD
View
Price last confirmed 39 days ago
Most Expensive
B
MOH London
CBBE91689 · Nov 1
$68,034 SGD
£41,904 GBP
View
18 more retailers have this diamond
Prices start from $40,410 SGDSave up to $27,624 SGD

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
$40,410 SGD