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Radiant|Lab Grown|IGI

1.00ct E SI2 Radiant Lab Grown Diamond

ID • E/SI2 • IGI LG474115423

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG474115423

Diamond specifications and retailer prices

From €525 EUR
$586 USD
As of October 30, 2026
Save €1,091 EUR (68%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €1,712 EUR at NZ Jewellers · As of October 28, 2026
View at NZ Jewellers

About this 1ct lab-grown radiant diamond

This 1ct lab-grown radiant sits in the classic one-carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG474115423 or 474115423. Listed at 10 retailers as of October 26, 2026, with a 208% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.00
Carat
E
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle50.4°
Pavilion angle30.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG474115423
Dimensions6.25 × 4.79 × 3.45 mm
L/W Ratio1.30
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.25 mm4.79 mm1.00 ctE / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG474115423
Side View
Table 67.0%Crown 50.4°Girdle: ThickPavilion 30.1°Culet: NoneDepth 72.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: €1,712 EUR|Low: €419 EUR|High: €2,860 EUR|Avg: €1,138 EUR
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 5€525 EUR
Retailer 8€588 EUR
Retailer 9€588 EUR
Retailer 6€651 EUR
Retailer 7€1,000 EUR
Retailer 2€1,017 EUR
Retailer 4€1,616 EUR
NZ Jewellers€1,712 EUR
Retailer 3€2,829 EUR

42 data points across 9 retailers

10 retailers€525 EUR to €1,616 EUR

B+
Cheapest Retailer
-
€525 EUR
$586 USD
B
Retailer 2
-
€588 EUR
$657 USD
View
Final sale: no returns
B
Retailer 3
-
€588 EUR
$657 USD
View
Retailer 4
-
€651 EUR
$727 USD
View
Price last confirmed 14 days ago
B
Retailer 5
-
€651 EUR
$727 USD
View
B
Retailer 6
-
€1,000 EUR
$1,117 USD
View
B
Retailer 7
-
€1,017 EUR
£895 GBP
View
B
Retailer 8
-
€1,616 EUR
$1,805 USD
View
Most Expensive
NZ Jewellers
2c24565e-93cb-4cc9-972a-0da2494af1a8 · Oct 28
€1,712 EUR
$1,913 USD
View
Price under review
8 more retailers have this diamond
Prices start from €525 EURSave up to €1,091 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.

B+
1.00ct Radiant
€525 EUR