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Marquise|Natural|GIA

1.51ct M SI2 Marquise Natural Diamond

VG • M/SI2 • GIA 6552612667

Certificate GIA 6552612667

Diamond specifications and retailer prices

From $4,255 SGD
$3,320 USD
As of November 5, 2026
2 retailers carry this diamond
Most expensive: $4,255 SGD at Brilliant Earth
View at Brilliant Earth

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded M colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6552612667. Listed at 2 retailers as of November 5, 2026. 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

1.51
Carat
M
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle37.45°
Pavilion angle40.38°
OriginNatural
Grading LabGIA
CertificateGIA 6552612667
Dimensions11.53 × 6.01 × 3.77 mm
L/W Ratio1.92
Girdle conditionVery Thick
Key to symbols
Crystal, Feather, Cavity, Needle
Top View
11.53 mm6.01 mm1.51 ctM / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6552612667
Side View
Table 60.0%Crown 37.45°Girdle: STK-VTKPavilion 40.38°CuletDepth 62.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 5
Current: $4,255 SGD|Low: $3,339 SGD|High: $4,255 SGD|Avg: $3,684 SGD
Brilliant Earth
Retailer 2
Retailer 3
October 31, 2026
Retailer 2$3,339 SGD
Retailer 3$3,754 SGD
Brilliant Earth$4,255 SGD

6 data points across 3 retailers

2 retailers

Retailer 1
-
$3,339 SGD
Price last confirmed 16 days ago
Most Expensive
B
Brilliant Earth
22377705A · Nov 5
$4,255 SGD
$3,320 USD
View
1 more retailer has this diamond

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
1.51ct Marquise
$4,255 SGD