CaratHunter
Plans
Radiant|Lab Grown|IGI

1.00ct H VS1 Radiant Lab Grown Diamond

GD • H/VS1 • IGI LG638428908

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

Certificate IGI LG638428908

Diamond specifications and retailer prices

From £186 GBP
$249 USD
As of November 1, 2026
Save £440 GBP (70%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £725 GBP at MOH London · As of October 18, 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 H colour (near-colourless) and VS1 clarity (very-slightly-included), with a standard cut grade and certified by IGI LG638428908 or 638428908. Listed at 9 retailers as of October 31, 2026, with a 237% 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
H
Colour
VS1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.6°
Pavilion angle33.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG638428908
Dimensions7.31 × 5.03 × 3.31 mm
L/W Ratio1.45
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.31 mm5.03 mm1.00 ctH / VS1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG638428908
Side View
Table 67.0%Crown 46.6°Girdle: MediumPavilion 33.3°Culet: NoneDepth 65.8%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: £725 GBP|Low: £186 GBP|High: £730 GBP|Avg: £407 GBP|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 18, 2026
Retailer 6£186 GBP
Retailer 3£256 GBP
Retailer 2£294 GBP
Retailer 4£321 GBP
Retailer 7£440 GBP
Retailer 5£625 GBP
MOH London£725 GBP

10 data points across 7 retailers

9 retailers£186 GBP to £625 GBP

A
Cheapest Retailer
-
£186 GBP
$249 USD
B+
Retailer 2
-
£256 GBP
$344 USD
View
B+
Retailer 3
-
£294 GBP
$395 USD
View
B+
Retailer 4
-
£306 GBP
$410 USD
View
B+
Retailer 5
-
£321 GBP
$431 USD
View
B+
Retailer 6
-
£335 GBP
$450 USD
View
B
Retailer 7
-
£505 GBP
View
B
Retailer 8
-
£625 GBP
$839 USD
View
Most Expensive
MOH London
LG638428908 · Oct 18
£725 GBP
View
Price last confirmed 15 days ago
8 more retailers have this diamond
Prices start from £186 GBPSave up to £440 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
£186 GBP