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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 $31,620 USD
₹3,011,413 INR
As of November 1, 2026
Save $21,598 USD (41%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $53,218 USD 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 $31,620 to $53,218, a $21,598 spread on the same certified stone. MOH London lists it at $53,218. 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
Color
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 1
Current: $53,218 USD|Low: $31,546 USD|High: $57,446 USD|Avg: $39,612 USD|-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 10$31,620 USD
Retailer 3$34,245 USD
Retailer 15$34,478 USD
Retailer 9$34,859 USD
Retailer 6$35,496 USD
Retailer 13$36,495 USD
Retailer 2$37,853 USD
Retailer 4$40,384 USD
Retailer 12$40,748 USD
Retailer 8$41,333 USD
Retailer 11$41,878 USD
Retailer 5$42,067 USD
Retailer 7$42,315 USD
Retailer 14$44,174 USD
MOH London$53,218 USD

20 data points across 15 retailers

19 retailers$31,620 USD to $53,218 USD

A
Cheapest Retailer
-
$31,620 USD
₹3,011,413 INR
B+
Retailer 2
-
$34,245 USD
View
A
Retailer 3
-
$34,478 USD
View
Final sale: no returns
B+
Retailer 4
-
$34,859 USD
£27,448 GBP
View
B+
Retailer 5
-
$35,496 USD
View
B+
Retailer 6
-
$36,495 USD
View
B+
Retailer 7
-
$37,853 USD
£29,805 GBP
View
Retailer 8
-
$38,111 USD
View
Price last confirmed 37 days ago
B+
Retailer 9
-
$40,384 USD
View
Retailer 10
-
$40,417 USD
View
Price last confirmed 12 days ago
B+
Retailer 11
-
$40,748 USD
View
B+
Retailer 12
-
$41,333 USD
€39,365 EUR
View
B+
Retailer 13
-
$41,878 USD
View
B
Retailer 14
-
$42,067 USD
View
B+
Retailer 15
-
$42,315 USD
View
Retailer 16
-
$43,750 USD
View
Price last confirmed 41 days ago
B+
Retailer 17
-
$44,174 USD
ZAR 713,642 ZAR
View
Retailer 18
-
$45,433 USD
View
Price last confirmed 39 days ago
Most Expensive
B
MOH London
CBBE91689 · Nov 1
$53,218 USD
£41,904 GBP
View
18 more retailers have this diamond
Prices start from $31,620 USDSave up to $21,598 USD

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
$31,620 USD