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Radiant|Lab Grown|IGI

1.00ct I SI1 Radiant Lab Grown Diamond

GD • I/SI1 • IGI LG407932707

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

Certificate IGI LG407932707

Diamond specifications and retailer prices

From £448 GBP
$600 USD
As of October 31, 2026
Save £1,407 GBP (76%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,935 GBP at MOH London · As of October 29, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG407932707 or 407932707. Listed at 11 retailers as of October 31, 2026, with a 314% 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

1.00
Carat
I
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle48.5°
Pavilion angle31°
OriginLab Grown
Grading LabIGI
CertificateIGI LG407932707
Dimensions6.67 × 4.61 × 3.52 mm
L/W Ratio1.45
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD) Type IIa
Top View
6.67 mm4.61 mm1.00 ctI / SI1
OriginLab Grown
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG407932707
Side View
Table 65.0%Crown 48.5°Girdle: ThickPavilion 31°Culet: NoneDepth 76.4%

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: £2,935 GBP|Low: £448 GBP|High: £2,957 GBP|Avg: £1,365 GBP|+0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 2£448 GBP
Retailer 6£742 GBP
Retailer 10£807 GBP
Retailer 11£831 GBP
Retailer 7£861 GBP
Retailer 12£993 GBP
Retailer 3£1,239 GBP
Retailer 8£1,375 GBP
Retailer 9£1,613 GBP
Retailer 5£1,855 GBP
Retailer 4£2,464 GBP
MOH London£2,935 GBP

19 data points across 12 retailers

11 retailers£448 GBP to £1,855 GBP

B+
Cheapest Retailer
-
£448 GBP
$600 USD
C
Retailer 2
-
£742 GBP
$994 USD
View
C
Retailer 3
-
£807 GBP
$1,081 USD
View
C
Retailer 4
-
£831 GBP
$1,113 USD
View
Final sale: no returns
Retailer 5
-
£861 GBP
$1,153 USD
View
Price last confirmed 20 days ago
C
Retailer 6
-
£861 GBP
$1,153 USD
View
C
Retailer 7
-
£993 GBP
$1,330 USD
View
C
Retailer 8
-
£1,375 GBP
$1,842 USD
View
C
Retailer 9
-
£1,613 GBP
$2,161 USD
View
C
Retailer 10
-
£1,855 GBP
$2,485 USD
View
Most Expensive
MOH London
LG407932707 · Oct 29
£2,935 GBP
View
Price under review
10 more retailers have this diamond
Prices start from £448 GBPSave up to £1,407 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+
1.00ct Radiant
£448 GBP