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Marquise|Natural|GIA

0.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 1555183694

Certificate GIA 1555183694

Diamond specifications and retailer prices

From €339 EUR
₹36,074 INR
As of November 2, 2026
Save €1,196 EUR (78%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: €1,535 EUR at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1555183694. Listed at 18 retailers as of October 30, 2026, with prices from €339 to €1,535, a €1,196 spread on the same certified stone. NZ Jewellers lists it at €1,535. 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
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1555183694
Dimensions9.37 × 4.07 × 2.42 mm
L/W Ratio2.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal
Top View
9.37 mm4.07 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 1555183694
Side View
Table 61.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 59.5%

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: €1,535 EUR|Low: €339 EUR|High: €1,535 EUR|Avg: €673 EUR
NZ Jewellers
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
November 2, 2026
Retailer 2€339 EUR
Retailer 4€451 EUR
Retailer 3€490 EUR
Retailer 13€527 EUR
Retailer 14€527 EUR
Retailer 11€565 EUR
Retailer 7€601 EUR
Retailer 9€618 EUR
Retailer 5€667 EUR
Retailer 6€683 EUR
Retailer 8€728 EUR
Retailer 12€756 EUR
Retailer 10€1,131 EUR
NZ Jewellers€1,535 EUR

24 data points across 14 retailers

18 retailers€339 EUR to €1,535 EUR

A
Cheapest Retailer
-
€339 EUR
₹36,074 INR
B+
Retailer 2
-
€451 EUR
$504 USD
View
Final sale: no returns
A
Retailer 3
-
€490 EUR
$547 USD
View
Retailer 4
-
€509 EUR
SGD 769 SGD
View
Price last confirmed 11 days ago
A
Retailer 5
-
€527 EUR
$589 USD
View
A
Retailer 6
-
€527 EUR
$589 USD
View
A
Retailer 7
-
€565 EUR
$631 USD
View
B+
Retailer 8
-
€565 EUR
$631 USD
View
B+
Retailer 9
-
€601 EUR
£529 GBP
View
B+
Retailer 10
-
€614 EUR
$686 USD
View
B+
Retailer 11
-
€618 EUR
£544 GBP
View
B+
Retailer 12
-
€667 EUR
$745 USD
View
B+
Retailer 13
-
€683 EUR
$763 USD
View
B+
Retailer 14
-
€728 EUR
View
Retailer 15
-
€745 EUR
A$1,280 AUD
View
Price last confirmed 29 days ago
B+
Retailer 16
-
€756 EUR
ZAR 13,639 ZAR
View
B
Retailer 17
-
€1,131 EUR
£995 GBP
View
Most Expensive
B
NZ Jewellers
4eef1496-8124-46e6-a1a6-194cfc9e4067 · Oct 30
€1,535 EUR
$1,715 USD
View
17 more retailers have this diamond
Prices start from €339 EURSave up to €1,196 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
€339 EUR