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Marquise|Natural|GIA

0.51ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 2554118321

Certificate GIA 2554118321

Diamond specifications and retailer prices

From €313 EUR
As of November 6, 2026
Save €376 EUR (55%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: €689 EUR at 77 Diamonds · As of November 5, 2026
View at 77 Diamonds

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter 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 2554118321. Listed at 3 retailers as of November 5, 2026, with prices from €313 to €689, a €376 spread on the same certified stone. 77 Diamonds lists it at €689. 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

0.51
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 2554118321
Dimensions7.01 × 4.33 × 2.78 mm
L/W Ratio1.62
Top View
7.01 mm4.33 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceStrong
CertificateGIA 2554118321
Side View
Table 60.0%CrownGirdle: VTK-XTKPavilionCulet: NoneDepth 64.2%

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 6
Current: €689 EUR|Low: €313 EUR|High: €697 EUR|Avg: €524 EUR|+1.2%
77 Diamonds
Retailer 2
Retailer 3
November 6, 2026
Retailer 2€313 EUR
Retailer 3€561 EUR
77 Diamonds€689 EUR

45 data points across 3 retailers

3 retailers€313 EUR to €689 EUR

A
Cheapest Retailer
-
€313 EUR
B+
Retailer 2
-
€561 EUR
View
Most Expensive
B
77 Diamonds
MQCPZ4JMPMMT · Nov 5
€689 EUR
£605 GBP
View
2 more retailers have this diamond
Prices start from €313 EURSave up to €376 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
0.51ct Marquise
€313 EUR