CaratHunter
Plans
Marquise|Natural|IGI

0.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • IGI 839658603

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 839658603

Diamond specifications and retailer prices

From €325 EUR
₹34,669 INR
As of October 31, 2026
Save €1,309 EUR (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: €1,633 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 and certified by IGI 839658603. Listed at 12 retailers as of October 30, 2026, with prices from €325 to €1,633, a €1,309 spread on the same certified stone. NZ Jewellers lists it at €1,633. 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

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle39.5°
OriginNatural
Grading LabIGI
CertificateIGI 839658603
Dimensions8.28 × 4.16 × 2.59 mm
L/W Ratio1.99
Girdle conditionFaceted
Top View
8.28 mm4.16 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 839658603
Side View
Table 60.0%Crown 37.3°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 62.3%

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: Oct 31
Current: €1,633 EUR|Low: €324 EUR|High: €1,633 EUR|Avg: €599 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
October 31, 2026
Retailer 2€325 EUR
Retailer 3€392 EUR
Retailer 5€406 EUR
Retailer 13€426 EUR
Retailer 11€459 EUR
Retailer 4€492 EUR
Retailer 8€525 EUR
Retailer 12€554 EUR
Retailer 6€558 EUR
Retailer 7€594 EUR
Retailer 10€606 EUR
Retailer 9€985 EUR
NZ Jewellers€1,633 EUR

14 data points across 13 retailers

12 retailers€325 EUR to €1,633 EUR

A
Cheapest Retailer
-
€325 EUR
₹34,669 INR
Retailer 2
-
€406 EUR
$455 USD
View
Price last confirmed 15 days ago
A
Retailer 3
-
€426 EUR
$478 USD
View
A
Retailer 4
-
€459 EUR
$515 USD
View
A
Retailer 5
-
€492 EUR
$552 USD
View
A
Retailer 6
-
€525 EUR
£463 GBP
View
B+
Retailer 7
-
€554 EUR
$621 USD
View
B+
Retailer 8
-
€558 EUR
£493 GBP
View
B+
Retailer 9
-
€594 EUR
View
B+
Retailer 10
-
€606 EUR
$680 USD
View
Retailer 11
-
€985 EUR
£870 GBP
View
Price last confirmed 7 days ago
Most Expensive
B
NZ Jewellers
8931b356-73f5-4507-8694-f0697f6376fd · Oct 30
€1,633 EUR
$1,832 USD
View
11 more retailers have this diamond
Prices start from €325 EURSave up to €1,309 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
€325 EUR