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Marquise|Natural|GIA

1.51ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 6552452687

Certificate GIA 6552452687

Diamond specifications and retailer prices

From $10,879 SGD
$8,510 USD
As of November 1, 2026
Save $2,876 SGD (21%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $13,756 SGD at Blue Nile · As of October 29, 2026
View at Blue Nile

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6552452687. Listed at 6 retailers as of October 29, 2026, with prices from $10,879 to $13,756, a $2,876 spread on the same certified stone. Blue Nile lists it at $13,756. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6552452687
Dimensions11.39 × 5.94 × 3.76 mm
L/W Ratio1.92
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Feather, Needle, Indented Natural
Top View
11.39 mm5.94 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6552452687
Side View
Table 60.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.3%

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: $13,756 SGD|Low: $10,531 SGD|High: $14,796 SGD|Avg: $12,243 SGD|-7.0%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 31, 2026
Retailer 4$10,879 SGD
Retailer 3$10,989 SGD
Retailer 5$11,765 SGD
Retailer 2$11,799 SGD
Retailer 6$12,270 SGD
Retailer 7$13,280 SGD
Blue Nile$13,756 SGD

37 data points across 7 retailers

6 retailers$10,879 SGD to $13,756 SGD

A
Cheapest Retailer
-
$10,879 SGD
$8,510 USD
A
Retailer 2
-
$10,989 SGD
View
A
Retailer 3
-
$11,765 SGD
$9,203 USD
View
A
Retailer 4
-
$11,799 SGD
£7,267 GBP
View
B+
Retailer 5
-
$12,270 SGD
$9,598 USD
View
Final sale: no returns
Most Expensive
B+
Blue Nile
29415853 · Oct 29
$13,756 SGD
$10,760 USD
View
5 more retailers have this diamond
Prices start from $10,879 SGDSave up to $2,876 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
1.51ct Marquise
$10,879 SGD