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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 $8,510 USD
As of November 1, 2026
Save $2,250 USD (21%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $10,760 USD 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 $8,510 to $10,760, a $2,250 spread on the same certified stone. Blue Nile lists it at $10,760. 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
Color
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: $10,760 USD|Low: $8,238 USD|High: $11,574 USD|Avg: $9,577 USD|-7.0%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 31, 2026
Retailer 4$8,510 USD
Retailer 3$8,596 USD
Retailer 5$9,203 USD
Retailer 2$9,229 USD
Retailer 6$9,598 USD
Retailer 7$10,388 USD
Blue Nile$10,760 USD

37 data points across 7 retailers

6 retailers$8,510 USD to $10,760 USD

A
Cheapest Retailer
-
$8,510 USD
A
Retailer 2
-
$8,596 USD
SGD 11,616 SGD
View
A
Retailer 3
-
$9,203 USD
View
A
Retailer 4
-
$9,229 USD
£7,267 GBP
View
B+
Retailer 5
-
$9,598 USD
View
Final sale: no returns
Most Expensive
B+
Blue Nile
29415853 · Oct 29
$10,760 USD
View
5 more retailers have this diamond
Prices start from $8,510 USDSave up to $2,250 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
1.51ct Marquise
$8,510 USD