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Radiant|Lab Grown|IGI

1.00ct F SI1 Radiant Lab Grown Diamond

VG • F/SI1 • IGI LG500148420

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

Certificate IGI LG500148420

Diamond specifications and retailer prices

From £472 GBP
As of November 6, 2026
Save £422 GBP (47%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,539 GBP at NZ Jewellers · As of November 6, 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 F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG500148420 or 500148420. Listed at 12 retailers as of November 6, 2026, with a 89% 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
F
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle41.2°
Pavilion angle31.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG500148420
Dimensions6.84 × 4.94 × 3.44 mm
L/W Ratio1.38
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.84 mm4.94 mm1.00 ctF / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG500148420
Side View
Table 63.5%Crown 41.2°Girdle: THN-MEDPavilion 31.9°Culet: NoneDepth 69.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,539 GBP|Low: £453 GBP|High: £2,334 GBP|Avg: £928 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 7£472 GBP
Retailer 11£513 GBP
Retailer 3£528 GBP
Retailer 9£548 GBP
Retailer 8£657 GBP
Retailer 5£680 GBP
Retailer 4£866 GBP
Retailer 10£894 GBP
Retailer 6£1,399 GBP
NZ Jewellers£1,539 GBP
Retailer 2£2,300 GBP

43 data points across 11 retailers

12 retailers£472 GBP to £894 GBP

B
Cheapest Retailer
-
£472 GBP
B
Retailer 2
-
£513 GBP
View
B
Retailer 3
-
£528 GBP
View
Final sale: no returns
Retailer 4
-
£548 GBP
View
Price last confirmed 22 days ago
B
Retailer 5
-
£548 GBP
View
B
Retailer 6
-
£657 GBP
View
B
Retailer 7
-
£680 GBP
View
B
Retailer 8
-
£866 GBP
View
C
Retailer 9
-
£894 GBP
View
Retailer 10
-
£1,399 GBP
View
Price under review
Most Expensive
NZ Jewellers
4418c550-0e3e-4dc5-83a2-7208e59ce592 · Nov 6
£1,539 GBP
$2,060 USD
View
Price under review
10 more retailers have this diamond
Prices start from £472 GBPSave up to £422 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
£472 GBP