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Radiant|Lab Grown|IGI

1.00ct D SI1 Radiant Lab Grown Diamond

VG • D/SI1 • IGI LG610345574

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

Certificate IGI LG610345574

Diamond specifications and retailer prices

From £110 GBP
As of November 6, 2026
Save £353 GBP (76%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £639 GBP at MOH London · As of October 25, 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 D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG610345574 or 610345574. Listed at 12 retailers as of November 4, 2026, with a 322% 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
D
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.1°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG610345574
Dimensions6.57 × 4.92 × 3.41 mm
L/W Ratio1.34
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
6.57 mm4.92 mm1.00 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG610345574
Side View
Table 66.0%Crown 47.1°Girdle: MediumPavilion 33.9°Culet: NoneDepth 69.3%

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: £639 GBP|Low: £105 GBP|High: £1,070 GBP|Avg: £287 GBP|-40.3%
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 6, 2026
Retailer 9£110 GBP
Retailer 7£128 GBP
Retailer 4£137 GBP
Retailer 11£137 GBP
Retailer 2£162 GBP
Retailer 5£233 GBP
Retailer 3£235 GBP
Retailer 8£252 GBP
Retailer 12£318 GBP
Retailer 10£439 GBP
Retailer 6£463 GBP
MOH London£639 GBP

44 data points across 12 retailers

12 retailers£110 GBP to £463 GBP

A
Cheapest Retailer
-
£110 GBP
A
Retailer 2
-
£128 GBP
View
Retailer 3
-
£137 GBP
View
Price last confirmed 13 days ago
B+
Retailer 4
-
£137 GBP
View
A
Retailer 5
-
£162 GBP
View
A
Retailer 6
-
£233 GBP
View
B+
Retailer 7
-
£235 GBP
View
B+
Retailer 8
-
£252 GBP
View
B+
Retailer 9
-
£318 GBP
View
B
Retailer 10
-
£439 GBP
View
B
Retailer 11
-
£463 GBP
View
Most Expensive
MOH London
LG610345574 · Oct 25
£639 GBP
View
Price last confirmed 12 days ago
11 more retailers have this diamond
Prices start from £110 GBPSave up to £353 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
£110 GBP