Radiant|Lab Grown|IGI

1.21ct D VS1 Radiant Lab Grown Diamond

ID • D/VS1 • IGI LG787630559

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

Certificate IGI LG787630559

Diamond specifications and retailer prices

From £137 GBP
$183 USD
As of October 30, 2026
Save £715 GBP (84%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £851 GBP at Reve Diamonds · As of November 1, 2026
View at Reve 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 VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG787630559 or 787630559. Listed at 17 retailers as of October 30, 2026, with prices from £137 to £851, a £715 spread on the same certified stone. Reve Diamonds lists it at £851. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
D
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle21.1°
Pavilion angle32.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG787630559
Dimensions7.43 × 5.20 × 3.50 mm
L/W Ratio1.43
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.43 mm5.20 mm1.21 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG787630559
Side View
Table 65.0%Crown 21.1°Girdle: MediumPavilion 32.3°Culet: NoneDepth 67.3%

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 30
Current: £794 GBP|Low: £131 GBP|High: £851 GBP|Avg: £384 GBP|-0.1%
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
Reve Diamonds
November 1, 2026
Retailer 13£137 GBP
Retailer 7£152 GBP
Retailer 3£159 GBP
Retailer 4£169 GBP
Retailer 14£169 GBP
Retailer 9£281 GBP
Retailer 10£292 GBP
Retailer 2£300 GBP
Retailer 8£307 GBP
Retailer 5£410 GBP
Retailer 11£414 GBP
Retailer 15£546 GBP
Retailer 12£576 GBP
Retailer 6£586 GBP
Retailer 1£794 GBP
Reve Diamonds£851 GBP

46 data points across 16 retailers

17 retailers£137 GBP to £851 GBP

A
Cheapest Retailer
-
£137 GBP
$183 USD
A
Retailer 2
-
£152 GBP
$204 USD
View
Final sale: no returns
A
Retailer 3
-
£159 GBP
$213 USD
View
Retailer 4
-
£169 GBP
$227 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
£169 GBP
$227 USD
View
A
Retailer 6
-
£281 GBP
€358 EUR
View
A
Retailer 7
-
£292 GBP
ZAR 6,311 ZAR
View
A
Retailer 8
-
£300 GBP
$402 USD
View
A
Retailer 9
-
£307 GBP
View
A
Retailer 10
-
£343 GBP
$460 USD
View
B+
Retailer 11
-
£410 GBP
$549 USD
View
B+
Retailer 12
-
£414 GBP
A$854 AUD
View
B+
Retailer 13
-
£546 GBP
$731 USD
View
B+
Retailer 14
-
£576 GBP
$772 USD
View
B
Retailer 15
-
£586 GBP
$785 USD
View
B
Retailer 16
-
£794 GBP
View
Most Expensive
B
Reve Diamonds
6114E3983 · Nov 1
£851 GBP
$1,141 USD
View
16 more retailers have this diamond
Prices start from £137 GBPSave up to £715 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
£137 GBP