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Marquise|Natural|IGI

3.50ct F SI2 Marquise Natural Diamond

F/SI2 • IGI 657443176

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 657443176

Diamond specifications and retailer prices

From $69,703 AUD
€46,523 EUR
As of October 28, 2026
Save $20,641 AUD (23%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $90,344 AUD at MOH London · As of October 29, 2026
View at MOH London

About this 3.5ct natural marquise diamond

This 3.5ct natural marquise sits in the three to five carat band, graded F colour (colourless) and SI2 clarity (slightly-included) and certified by IGI 657443176. Listed at 2 retailers as of October 28, 2026, with prices from $69,703 to $90,344, a $20,641 spread on the same certified stone. MOH London lists it at $90,344. 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

3.50
Carat
F
Colour
SI2
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle38.9°
Pavilion angle42.1°
OriginNatural
Grading LabIGI
CertificateIGI 657443176
Dimensions14.44 × 7.76 × 5.32 mm
L/W Ratio1.86
Girdle conditionFaceted
Top View
14.44 mm7.76 mm3.50 ctF / SI2
OriginNatural
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 657443176
Side View
Table 55.0%Crown 38.9°Girdle: THK-VTKPavilion 42.1°CuletDepth 68.6%

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 28
Current: $90,344 AUD|Low: $69,297 AUD|High: $90,824 AUD|Avg: $80,623 AUD|-0.5%
MOH London
Retailer 2
October 29, 2026
Retailer 2$69,703 AUD
MOH London$90,344 AUD

8 data points across 2 retailers

2 retailers$69,703 AUD to $90,344 AUD

B+
Cheapest Retailer
-
$69,703 AUD
€46,523 EUR
Most Expensive
B
MOH London
8B6BEBC28 · Oct 29
$90,344 AUD
£49,854 GBP
View
1 more retailer has this diamond
Prices start from $69,703 AUDSave up to $20,641 AUD

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+
3.50ct Marquise
$69,703 AUD