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Radiant|Lab Grown|IGI

1.28ct F VS1 Radiant Lab Grown Diamond

ID • F/VS1 • IGI LG831640256

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

Certificate IGI LG831640256

Diamond specifications and retailer prices

From £133 GBP
$178 USD
As of November 2, 2026
Save £1,143 GBP (90%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,276 GBP at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

About this 1.28ct lab-grown radiant diamond

This 1.28ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG831640256 or 831640256. Listed at 14 retailers as of November 2, 2026, with prices from £133 to £1,276, a £1,143 spread on the same certified stone. Do Amore Diamonds lists it at £1,276. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
F
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.8°
Pavilion angle34.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831640256
Dimensions7.75 × 5.32 × 3.53 mm
L/W Ratio1.46
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.75 mm5.32 mm1.28 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831640256
Side View
Table 63.0%Crown 42.8°Girdle: MediumPavilion 34.6°Culet: NoneDepth 66.4%

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 2
Current: £1,276 GBP|Low: £128 GBP|High: £1,276 GBP|Avg: £513 GBP|+7.5%
Do Amore Diamonds
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
November 1, 2026
Retailer 14£133 GBP
Retailer 13£154 GBP
Retailer 15£258 GBP
Retailer 3£284 GBP
Retailer 5£292 GBP
Retailer 9£443 GBP
Retailer 8£478 GBP
Retailer 11£478 GBP
Retailer 10£518 GBP
Retailer 7£553 GBP
Retailer 12£558 GBP
Retailer 4£584 GBP
Retailer 6£742 GBP
Retailer 2£848 GBP
Do Amore Diamonds£1,276 GBP

26 data points across 15 retailers

14 retailers£133 GBP to £1,276 GBP

A
Cheapest Retailer
-
£133 GBP
$178 USD
A
Retailer 2
-
£154 GBP
$206 USD
View
A
Retailer 3
-
£258 GBP
HK$2,700 HKD
View
A
Retailer 4
-
£284 GBP
$380 USD
View
A
Retailer 5
-
£292 GBP
$391 USD
View
B+
Retailer 6
-
£443 GBP
A$913 AUD
View
B+
Retailer 7
-
£478 GBP
$640 USD
View
Retailer 8
-
£478 GBP
$640 USD
View
Price last confirmed 11 days ago
B+
Retailer 9
-
£518 GBP
A$1,067 AUD
View
B
Retailer 10
-
£558 GBP
$748 USD
View
B+
Retailer 11
-
£584 GBP
$782 USD
View
B
Retailer 12
-
£742 GBP
SGD 1,344 SGD
View
B
Retailer 13
-
£848 GBP
View
Most Expensive
B
Do Amore Diamonds
27-B6CB48D66 · Nov 2
£1,276 GBP
$1,710 USD
View
13 more retailers have this diamond
Prices start from £133 GBPSave up to £1,143 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
1.28ct Radiant
£133 GBP