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Marquise|Natural|GIA

2.51ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 6551291620

Certificate GIA 6551291620

Diamond specifications and retailer prices

From €19,037 EUR
CA$29,655 CAD
As of November 2, 2026
Save €12,264 EUR (39%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €31,300 EUR at MOH London · As of November 2, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551291620. Listed at 11 retailers as of November 2, 2026, with prices from €19,037 to €31,300, a €12,264 spread on the same certified stone. MOH London lists it at €31,300. 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
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle40.07°
OriginNatural
Grading LabGIA
CertificateGIA 6551291620
Dimensions13.51 × 7.14 × 4.53 mm
L/W Ratio1.89
Key to symbols
Twinning Wisp, Feather, Crystal, Needle
Top View
13.51 mm7.14 mm2.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551291620
Side View
Table 62.0%CrownGirdle: STK-VTKPavilion 40.07°Culet: NoneDepth 63.5%

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 2
Current: €31,300 EUR|Low: €15,669 EUR|High: €31,677 EUR|Avg: €21,517 EUR|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 2, 2026
Retailer 9€15,669 EUR
Retailer 4€16,885 EUR
Retailer 8€17,116 EUR
Retailer 2€19,037 EUR
Retailer 3€19,155 EUR
Retailer 10€19,350 EUR
Retailer 13€20,566 EUR
Retailer 11€20,839 EUR
Retailer 18€21,089 EUR
Retailer 5€21,737 EUR
Retailer 7€21,737 EUR
Retailer 14€21,978 EUR
Retailer 6€22,459 EUR
Retailer 15€23,606 EUR
Retailer 12€23,674 EUR
Retailer 16€24,356 EUR
Retailer 17€28,392 EUR
MOH London€31,300 EUR

14 data points across 18 retailers

11 retailers€19,037 EUR to €31,300 EUR

A
Cheapest Retailer
-
€19,037 EUR
CA$29,655 CAD
A
Retailer 2
-
€19,155 EUR
$21,485 USD
View
A
Retailer 3
-
€20,566 EUR
£18,163 GBP
View
B+
Retailer 4
-
€20,839 EUR
$23,373 USD
View
Retailer 5
-
€21,089 EUR
$23,654 USD
View
Price last confirmed 12 days ago
B+
Retailer 6
-
€21,978 EUR
$24,651 USD
View
B+
Retailer 7
-
€23,606 EUR
$26,477 USD
View
B+
Retailer 8
-
€23,674 EUR
View
Retailer 9
-
€24,356 EUR
$27,317 USD
View
Price last confirmed 12 days ago
Retailer 10
-
€28,392 EUR
$31,845 USD
View
Price last confirmed 13 days ago
Most Expensive
B
MOH London
ED73D92D5 · Nov 2
€31,300 EUR
£27,643 GBP
View
10 more retailers have this diamond
Prices start from €19,037 EURSave up to €12,264 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.

A
2.51ct Marquise
€19,037 EUR