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Radiant|Lab Grown|IGI

1.00ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG677580013

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

Certificate IGI LG677580013

Diamond specifications and retailer prices

From €181 EUR
As of November 6, 2026
Save €543 EUR (75%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €1,050 EUR at MOH London · As of October 25, 2026
View at MOH London

About this 1ct lab-grown radiant diamond

This 1ct lab-grown radiant sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG677580013 or 677580013. Listed at 15 retailers as of November 4, 2026, with a 300% 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
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG677580013
Dimensions6.88 × 4.92 × 3.27 mm
L/W Ratio1.40
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.88 mm4.92 mm1.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG677580013
Side View
Table 66.0%Crown 37.4°Girdle: STK-THKPavilionCulet: NoneDepth 66.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: €1,050 EUR|Low: €174 EUR|High: €1,061 EUR|Avg: €414 EUR|+4.1%
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
November 6, 2026
Retailer 9€181 EUR
Retailer 4€202 EUR
Retailer 14€210 EUR
Retailer 3€224 EUR
Retailer 11€224 EUR
Retailer 5€274 EUR
Retailer 2€289 EUR
Retailer 13€390 EUR
Retailer 7€408 EUR
Retailer 6€435 EUR
Retailer 10€519 EUR
Retailer 12€721 EUR
Retailer 8€724 EUR
MOH London€1,050 EUR

45 data points across 14 retailers

15 retailers€181 EUR to €724 EUR

A
Cheapest Retailer
-
€181 EUR
A
Retailer 2
-
€202 EUR
View
Final sale: no returns
A
Retailer 3
-
€210 EUR
View
A
Retailer 4
-
€224 EUR
View
Retailer 5
-
€224 EUR
View
Price last confirmed 13 days ago
A
Retailer 6
-
€274 EUR
View
A
Retailer 7
-
€289 EUR
View
B+
Retailer 8
-
€390 EUR
View
B+
Retailer 9
-
€408 EUR
View
B+
Retailer 10
-
€435 EUR
View
B+
Retailer 11
-
€447 EUR
View
B+
Retailer 12
-
€519 EUR
View
B
Retailer 13
-
€721 EUR
View
B
Retailer 14
-
€724 EUR
View
Most Expensive
MOH London
LG677580013 · Oct 25
€1,050 EUR
£923 GBP
View
Price last confirmed 12 days ago
14 more retailers have this diamond
Prices start from €181 EURSave up to €543 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
1.00ct Radiant
€181 EUR