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Radiant|Lab Grown|IGI

1.00ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG490176326

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

Certificate IGI LG490176326

Diamond specifications and retailer prices

From £99 GBP
As of November 6, 2026
Save £857 GBP (90%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £956 GBP at Do Amore Diamonds · As of November 6, 2026
View at Do Amore Diamonds

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 LG490176326 or 490176326. Listed at 20 retailers as of November 6, 2026, with prices from £99 to £956, a £857 spread on the same certified stone. Do Amore Diamonds lists it at £956. 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 angle40.1°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG490176326
Dimensions7.05 × 4.97 × 3.39 mm
L/W Ratio1.42
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
7.05 mm4.97 mm1.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG490176326
Side View
Table 63.0%Crown 40.1°Girdle: MED-STKPavilion 35.1°Culet: NoneDepth 68.2%

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: £956 GBP|Low: £96 GBP|High: £956 GBP|Avg: £308 GBP
Do Amore Diamonds
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
Retailer 15
November 6, 2026
Retailer 9£99 GBP
Retailer 7£111 GBP
Retailer 14£115 GBP
Retailer 15£123 GBP
Retailer 3£177 GBP
Retailer 5£193 GBP
Retailer 10£232 GBP
Retailer 2£240 GBP
Retailer 13£258 GBP
Retailer 12£295 GBP
Retailer 6£411 GBP
Retailer 4£418 GBP
Retailer 8£437 GBP
Retailer 11£634 GBP
Do Amore Diamonds£956 GBP

43 data points across 15 retailers

20 retailers£99 GBP to £956 GBP

A
Cheapest Retailer
-
£99 GBP
A
Retailer 2
-
£111 GBP
View
Final sale: no returns
A
Retailer 3
-
£115 GBP
View
A
Retailer 4
-
£123 GBP
View
A
Retailer 5
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£164 GBP
View
B+
Retailer 6
-
£193 GBP
View
A
Retailer 7
-
£210 GBP
View
A
Retailer 8
-
£232 GBP
View
A
Retailer 9
-
£240 GBP
View
A
Retailer 10
-
£258 GBP
View
B+
Retailer 11
-
£295 GBP
View
B+
Retailer 12
-
£307 GBP
View
B
Retailer 13
-
£394 GBP
View
B+
Retailer 14
-
£411 GBP
View
B+
Retailer 15
-
£418 GBP
View
B+
Retailer 16
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£437 GBP
View
B
Retailer 17
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£517 GBP
View
B
Retailer 18
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£567 GBP
View
B
Retailer 19
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£634 GBP
View
Most Expensive
B
Do Amore Diamonds
27-4E1C3A675 · Nov 6
£956 GBP
$1,280 USD
View
19 more retailers have this diamond
Prices start from £99 GBPSave up to £857 GBP

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
£99 GBP