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Radiant|Lab Grown|IGI

1.00ct D VS1 Radiant Lab Grown Diamond

EX • D/VS1 • IGI LG821643185

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

Certificate IGI LG821643185

Diamond specifications and retailer prices

From £154 GBP
$207 USD
As of October 25, 2026
Save £657 GBP (81%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,336 GBP at Queensmith · As of October 25, 2026
View at Queensmith

About this 1ct lab-grown radiant diamond

This 1ct lab-grown radiant sits in the classic one-carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG821643185 or 821643185. Listed at 21 retailers as of October 25, 2026, with a 425% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
D
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.5°
Pavilion angle37.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821643185
Dimensions7.04 × 4.93 × 3.36 mm
L/W Ratio1.43
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
7.04 mm4.93 mm1.00 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821643185
Side View
Table 66.0%Crown 40.5°Girdle: MED-STKPavilion 37.7°Culet: NoneDepth 68.2%

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: Oct 25
Current: £376 GBP|Low: £119 GBP|High: £811 GBP|Avg: £348 GBP|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
October 26, 2026
Retailer 4£125 GBP
Retailer 2£139 GBP
Retailer 8£144 GBP
Retailer 6£154 GBP
Retailer 9£154 GBP
Retailer 17£207 GBP
Retailer 16£257 GBP
Retailer 14£261 GBP
Retailer 11£265 GBP
Retailer 1£376 GBP
Retailer 10£390 GBP
Retailer 18£406 GBP
Retailer 15£418 GBP
Retailer 13£443 GBP
Retailer 7£496 GBP
Retailer 5£642 GBP
Retailer 12£722 GBP
Retailer 3£811 GBP

39 data points across 18 retailers

21 retailers£154 GBP to £811 GBP

Retailer 1
-
£125 GBP
$167 USD
Price last confirmed 8 days ago
Retailer 2
-
£144 GBP
$193 USD
View
Price last confirmed 7 days ago
A
Retailer 3
-
£154 GBP
$207 USD
View
A
Retailer 4
-
£154 GBP
$207 USD
View
Retailer 5
-
£207 GBP
View
Price last confirmed 15 days ago
B+
Retailer 6
-
£209 GBP
$280 USD
View
A
Retailer 7
-
£249 GBP
$333 USD
View
Retailer 8
-
£257 GBP
€328 EUR
View
Price last confirmed 8 days ago
Retailer 9
-
£261 GBP
ZAR 5,642 ZAR
View
Price last confirmed 9 days ago
A
Retailer 10
-
£265 GBP
View
B+
Retailer 11
-
£376 GBP
A$775 AUD
View
B+
Retailer 12
-
£390 GBP
$523 USD
View
B+
Retailer 13
-
£406 GBP
$544 USD
View
B+
Retailer 14
-
£418 GBP
$560 USD
View
B+
Retailer 15
-
£443 GBP
A$913 AUD
View
B+
Retailer 16
-
£496 GBP
$664 USD
View
B
Retailer 17
-
£537 GBP
$719 USD
View
B
Retailer 18
-
£642 GBP
$860 USD
View
B
Retailer 19
-
£722 GBP
View
B
Retailer 20
-
£811 GBP
$1,087 USD
View
Most Expensive
Queensmith
LG821643185 · Oct 25
£1,336 GBP
View
Price under review
20 more retailers have this diamond
Prices start from £154 GBPSave up to £657 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
£154 GBP