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Marquise|Natural|GIA

2.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 2557437360

Certificate GIA 2557437360

Diamond specifications and retailer prices

From €20,117 EUR
$22,563 USD
As of October 30, 2026
Save €14,390 EUR (42%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: €34,507 EUR at MOH London · As of November 1, 2026
View at MOH London

About this 2.51ct natural marquise diamond

This 2.51ct natural marquise sits in the two to three carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557437360. Listed at 22 retailers as of October 30, 2026, with prices from €20,117 to €34,507, a €14,390 spread on the same certified stone. MOH London lists it at €34,507. 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

2.51
Carat
I
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle38.37°
Pavilion angle41.81°
OriginNatural
Grading LabGIA
CertificateGIA 2557437360
Dimensions13.17 × 7.01 × 4.60 mm
L/W Ratio1.88
Girdle conditionVery Thick
Culet sizeNone
Key to symbols
Feather, Knot, Cloud, Crystal, Cavity, Needle, Indented Natural
Top View
13.17 mm7.01 mm2.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2557437360
Side View
Table 60.0%Crown 38.37°GirdlePavilion 41.81°Culet: NoneDepth 65.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: €34,507 EUR|Low: €20,117 EUR|High: €34,923 EUR|Avg: €25,002 EUR|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 9€20,117 EUR
Retailer 8€21,174 EUR
Retailer 10€21,518 EUR
Retailer 7€22,095 EUR
Retailer 4€22,274 EUR
Retailer 3€22,274 EUR
Retailer 11€22,279 EUR
Retailer 2€25,422 EUR
Retailer 6€26,809 EUR
Retailer 5€30,552 EUR
MOH London€34,507 EUR

37 data points across 11 retailers

22 retailers€20,117 EUR to €34,507 EUR

B+
Cheapest Retailer
-
€20,117 EUR
$22,563 USD
B+
Retailer 2
-
€21,174 EUR
$23,749 USD
View
Final sale: no returns
B+
Retailer 3
-
€21,518 EUR
$24,135 USD
View
B+
Retailer 4
-
€22,095 EUR
$24,782 USD
View
B+
Retailer 5
-
€22,274 EUR
£19,672 GBP
View
Retailer 6
-
€22,274 EUR
A$38,435 AUD
View
Price last confirmed 29 days ago
B+
Retailer 7
-
€22,279 EUR
$24,988 USD
View
Retailer 8
-
€23,200 EUR
$26,021 USD
View
Price last confirmed 32 days ago
B+
Retailer 9
-
€23,200 EUR
$26,021 USD
View
B+
Retailer 10
-
€23,617 EUR
$26,488 USD
View
Retailer 11
-
€23,936 EUR
$26,847 USD
View
Price last confirmed 25 days ago
Retailer 12
-
€23,936 EUR
$26,847 USD
View
Price last confirmed 11 days ago
B
Retailer 13
-
€24,606 EUR
$27,598 USD
View
B
Retailer 14
-
€24,857 EUR
$27,880 USD
View
Retailer 15
-
€24,857 EUR
$27,880 USD
View
Price last confirmed 24 days ago
Retailer 16
-
€24,857 EUR
$27,880 USD
View
Price last confirmed 12 days ago
B
Retailer 17
-
€25,422 EUR
£22,452 GBP
View
B
Retailer 18
-
€26,809 EUR
View
B
Retailer 19
-
€30,552 EUR
ZAR 553,597 ZAR
View
Retailer 20
-
€31,302 EUR
$35,108 USD
View
Price last confirmed 12 days ago
Retailer 21
-
€31,302 EUR
$35,108 USD
View
Price last confirmed 33 days ago
Most Expensive
B
MOH London
6C219CCA7 · Nov 1
€34,507 EUR
£30,475 GBP
View
21 more retailers have this diamond
Prices start from €20,117 EURSave up to €14,390 EUR

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+
2.51ct Marquise
€20,117 EUR