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Radiant|Lab Grown|IGI

1.01ct I SI1 Radiant Lab Grown Diamond

GD • I/SI1 • IGI LG407938943

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

Certificate IGI LG407938943

Diamond specifications and retailer prices

From £455 GBP
$610 USD
As of October 31, 2026
Save £1,361 GBP (75%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,947 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.01ct lab-grown radiant diamond

This 1.01ct lab-grown radiant sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG407938943 or 407938943. Listed at 11 retailers as of October 31, 2026, with a 299% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.01
Carat
I
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle48.8°
Pavilion angle31.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG407938943
Dimensions6.21 × 4.89 × 3.56 mm
L/W Ratio1.27
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD) Type IIa
Top View
6.21 mm4.89 mm1.01 ctI / SI1
OriginLab Grown
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG407938943
Side View
Table 63.5%Crown 48.8°Girdle: STK-THKPavilion 31.5°Culet: NoneDepth 72.8%

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 31
Current: £2,947 GBP|Low: £455 GBP|High: £2,987 GBP|Avg: £1,375 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 2£455 GBP
Retailer 5£749 GBP
Retailer 9£815 GBP
Retailer 10£838 GBP
Retailer 6£869 GBP
Retailer 11£1,000 GBP
Retailer 3£1,249 GBP
Retailer 7£1,387 GBP
Retailer 8£1,628 GBP
Retailer 12£1,816 GBP
Retailer 4£2,488 GBP
MOH London£2,947 GBP

19 data points across 12 retailers

11 retailers£455 GBP to £1,816 GBP

B+
Cheapest Retailer
-
£455 GBP
$610 USD
B
Retailer 2
-
£749 GBP
$1,004 USD
View
C
Retailer 3
-
£815 GBP
$1,092 USD
View
C
Retailer 4
-
£838 GBP
$1,123 USD
View
Final sale: no returns
Retailer 5
-
£869 GBP
$1,164 USD
View
Price last confirmed 20 days ago
C
Retailer 6
-
£869 GBP
$1,164 USD
View
C
Retailer 7
-
£1,000 GBP
$1,340 USD
View
C
Retailer 8
-
£1,387 GBP
$1,859 USD
View
C
Retailer 9
-
£1,628 GBP
$2,182 USD
View
C
Retailer 10
-
£1,816 GBP
$2,433 USD
View
Most Expensive
MOH London
LG407938943 · Nov 1
£2,947 GBP
View
Price under review
10 more retailers have this diamond
Prices start from £455 GBPSave up to £1,361 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.

B+
1.01ct Radiant
£455 GBP