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Radiant|Lab Grown|IGI

1.21ct D VVS1 Radiant Lab Grown Diamond

GD • D/VVS1 • IGI LG623420555

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

Certificate IGI LG623420555

Diamond specifications and retailer prices

From £153 GBP
As of November 4, 2026
Save £1,321 GBP (90%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,474 GBP at Do Amore Diamonds · As of November 4, 2026
View at Do Amore Diamonds

About this 1.21ct lab-grown radiant diamond

This 1.21ct lab-grown radiant sits in the classic one-carat band, graded D colour (colourless) and VVS1 clarity (very-very-slightly-included), with a standard cut grade and certified by IGI LG623420555 or 623420555. Listed at 21 retailers as of November 4, 2026, with prices from £153 to £1,474, a £1,321 spread on the same certified stone. Do Amore Diamonds lists it at £1,474. 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

1.21
Carat
D
Colour
VVS1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.9°
Pavilion angle37.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG623420555
Dimensions7.65 × 5.23 × 3.55 mm
L/W Ratio1.46
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
7.65 mm5.23 mm1.21 ctD / VVS1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG623420555
Side View
Table 64.0%Crown 41.9°Girdle: MediumPavilion 37.7°Culet: NoneDepth 67.9%

Caratlytics Score

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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 4
Current: £389 GBP|Low: £147 GBP|High: £1,422 GBP|Avg: £490 GBP|+3.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
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Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
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Retailer 17
November 5, 2026
Retailer 4£153 GBP
Retailer 14£171 GBP
Retailer 3£179 GBP
Retailer 2£190 GBP
Retailer 17£190 GBP
Retailer 7£256 GBP
Retailer 9£304 GBP
Retailer 11£363 GBP
Retailer 1£389 GBP
Retailer 10£514 GBP
Retailer 16£615 GBP
Retailer 5£676 GBP
Retailer 6£704 GBP
Retailer 15£793 GBP
Retailer 8£824 GBP
Retailer 12£842 GBP
Retailer 13£1,393 GBP

45 data points across 17 retailers

21 retailers£153 GBP to £1,474 GBP

A
Cheapest Retailer
-
£153 GBP
A
Retailer 2
-
£171 GBP
View
Final sale: no returns
A
Retailer 3
-
£179 GBP
View
Retailer 4
-
£190 GBP
View
Price last confirmed 11 days ago
A
Retailer 5
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£190 GBP
View
B+
Retailer 6
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£256 GBP
View
B+
Retailer 7
-
£304 GBP
View
B+
Retailer 8
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£337 GBP
View
B+
Retailer 9
-
£363 GBP
View
B+
Retailer 10
-
£389 GBP
View
B+
Retailer 11
-
£514 GBP
View
B
Retailer 12
-
£615 GBP
View
B
Retailer 13
-
£676 GBP
View
Retailer 14
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£704 GBP
View
Price last confirmed 28 days ago
Retailer 15
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£793 GBP
View
Price last confirmed 18 days ago
B
Retailer 16
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£803 GBP
View
B
Retailer 17
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£824 GBP
View
B
Retailer 18
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£842 GBP
View
B
Retailer 19
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£901 GBP
View
B
Retailer 20
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£1,393 GBP
View
Most Expensive
B
Do Amore Diamonds
27-EBF7213F3 · Nov 4
£1,474 GBP
$1,990 USD
View
20 more retailers have this diamond
Prices start from £153 GBPSave up to £1,321 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
1.21ct Radiant
£153 GBP