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Marquise|Natural|GIA

2.51ct D SI1 Marquise Natural Diamond

VG • D/SI1 • GIA 5242029817

Certificate GIA 5242029817

Diamond specifications and retailer prices

From $27,931 USD
SGD 37,745 SGD
As of November 3, 2026
Save $24,221 USD (46%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $52,152 USD at With Clarity · As of November 2, 2026
View at With Clarity

About this 2.51ct natural marquise diamond

This 2.51ct natural marquise sits in the two to three carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 5242029817. Listed at 14 retailers as of November 2, 2026, with prices from $27,931 to $52,152, a $24,221 spread on the same certified stone. With Clarity lists it at $52,152. 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

2.51
Carat
D
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.72°
Pavilion angle39.61°
OriginNatural
Grading LabGIA
CertificateGIA 5242029817
Dimensions12.82 × 6.92 × 4.52 mm
L/W Ratio1.85
Culet sizeNone
Top View
12.82 mm6.92 mm2.51 ctD / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5242029817
Side View
Table 59.0%Crown 39.72°Girdle: THN-VTKPavilion 39.61°Culet: NDepth 65.3%

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 3
Current: $42,893 USD|Low: $27,931 USD|High: $54,298 USD|Avg: $36,536 USD|-7.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
With Clarity
November 3, 2026
Retailer 11$27,931 USD
Retailer 7$29,936 USD
Retailer 10$30,487 USD
Retailer 12$30,488 USD
Retailer 9$30,824 USD
Retailer 13$31,345 USD
Retailer 6$31,627 USD
Retailer 2$33,914 USD
Retailer 8$35,796 USD
Retailer 3$35,829 USD
Retailer 5$36,645 USD
Retailer 1$42,893 USD
Retailer 4$45,016 USD
With Clarity$52,152 USD

29 data points across 14 retailers

14 retailers$27,931 USD to $52,152 USD

A
Cheapest Retailer
-
$27,931 USD
SGD 37,745 SGD
A
Retailer 2
-
$29,936 USD
£23,572 GBP
View
A
Retailer 3
-
$30,487 USD
View
A
Retailer 4
-
$30,488 USD
View
A
Retailer 5
-
$30,824 USD
View
A
Retailer 6
-
$31,345 USD
View
A
Retailer 7
-
$31,627 USD
SGD 42,739 SGD
View
B+
Retailer 8
-
$33,914 USD
View
B+
Retailer 9
-
$35,796 USD
€34,091 EUR
View
B+
Retailer 10
-
$35,829 USD
View
Retailer 11
-
$36,645 USD
View
Price last confirmed 7 days ago
B
Retailer 12
-
$42,893 USD
View
B+
Retailer 13
-
$45,016 USD
View
Most Expensive
B
With Clarity
5242029817 · Nov 2
$52,152 USD
View
13 more retailers have this diamond
Prices start from $27,931 USDSave up to $24,221 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
2.51ct Marquise
$27,931 USD