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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 €19,231 EUR
$21,485 USD
As of November 2, 2026
Save €12,193 EUR (39%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €31,424 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 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 10 retailers as of November 1, 2026, with prices from €19,231 to €31,424, a €12,193 spread on the same certified stone. MOH London lists it at €31,424. 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
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: €31,424 EUR|Low: €15,731 EUR|High: €31,802 EUR|Avg: €21,602 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€15,731 EUR
Retailer 4€16,951 EUR
Retailer 8€17,184 EUR
Retailer 17€19,111 EUR
Retailer 3€19,231 EUR
Retailer 10€19,426 EUR
Retailer 11€20,647 EUR
Retailer 15€20,921 EUR
Retailer 18€21,172 EUR
Retailer 5€21,822 EUR
Retailer 7€21,822 EUR
Retailer 12€22,065 EUR
Retailer 6€22,547 EUR
Retailer 13€23,699 EUR
Retailer 2€23,767 EUR
Retailer 14€24,451 EUR
Retailer 16€28,504 EUR
MOH London€31,424 EUR

14 data points across 18 retailers

10 retailers€19,231 EUR to €31,424 EUR

A
Cheapest Retailer
-
€19,231 EUR
$21,485 USD
A
Retailer 2
-
€20,647 EUR
£18,163 GBP
View
Retailer 3
-
€20,921 EUR
$23,373 USD
View
Price last confirmed 11 days ago
Retailer 4
-
€21,172 EUR
$23,654 USD
View
Price last confirmed 11 days ago
B+
Retailer 5
-
€22,065 EUR
$24,651 USD
View
B+
Retailer 6
-
€23,699 EUR
$26,477 USD
View
B+
Retailer 7
-
€23,767 EUR
View
Retailer 8
-
€24,451 EUR
$27,317 USD
View
Price last confirmed 11 days ago
Retailer 9
-
€28,504 EUR
$31,845 USD
View
Price last confirmed 12 days ago
Most Expensive
B
MOH London
ED73D92D5 · Nov 1
€31,424 EUR
£27,643 GBP
View
9 more retailers have this diamond
Prices start from €19,231 EURSave up to €12,193 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
€19,231 EUR