Radiant|Lab Grown|IGI

1.28ct F VS1 Radiant Lab Grown Diamond

ID • F/VS1 • IGI LG644447705

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

Certificate IGI LG644447705

Diamond specifications and retailer prices

From £187 GBP
$251 USD
As of November 2, 2026
Save £743 GBP (80%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £931 GBP at MOH London · As of November 1, 2026
View at MOH London

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 LG644447705 or 644447705. Listed at 18 retailers as of November 1, 2026, with prices from £187 to £931, a £743 spread on the same certified stone. MOH London lists it at £931. 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 angle38.3°
Pavilion angle36.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG644447705
Dimensions7.79 × 5.34 × 3.63 mm
L/W Ratio1.46
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.79 mm5.34 mm1.28 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG644447705
Side View
Table 68.0%Crown 38.3°Girdle: STK-THKPavilion 36.9°Culet: NoneDepth 68.0%

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: £931 GBP|Low: £180 GBP|High: £942 GBP|Avg: £491 GBP|+4.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 18
November 2, 2026
Retailer 16£187 GBP
Retailer 6£210 GBP
Retailer 4£217 GBP
Retailer 5£232 GBP
Retailer 17£232 GBP
Retailer 14£351 GBP
Retailer 7£374 GBP
Retailer 3£390 GBP
Retailer 11£401 GBP
Retailer 9£422 GBP
Retailer 2£442 GBP
Retailer 13£566 GBP
Retailer 12£627 GBP
Retailer 15£713 GBP
Retailer 18£747 GBP
Retailer 10£785 GBP
Retailer 8£910 GBP
MOH London£931 GBP

44 data points across 18 retailers

18 retailers£187 GBP to £931 GBP

A
Cheapest Retailer
-
£187 GBP
$251 USD
A
Retailer 2
-
£210 GBP
$281 USD
View
Final sale: no returns
A
Retailer 3
-
£217 GBP
$291 USD
View
Retailer 4
-
£232 GBP
$311 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
£232 GBP
$311 USD
View
A
Retailer 6
-
£351 GBP
$470 USD
View
B+
Retailer 7
-
£374 GBP
$501 USD
View
B+
Retailer 8
-
£390 GBP
$522 USD
View
B+
Retailer 9
-
£401 GBP
ZAR 8,683 ZAR
View
B+
Retailer 10
-
£422 GBP
$566 USD
View
B+
Retailer 11
-
£442 GBP
View
B+
Retailer 12
-
£566 GBP
A$1,166 AUD
View
B
Retailer 13
-
£627 GBP
$840 USD
View
B
Retailer 14
-
£713 GBP
$956 USD
View
B
Retailer 15
-
£747 GBP
$1,001 USD
View
B
Retailer 16
-
£785 GBP
$1,052 USD
View
B
Retailer 17
-
£910 GBP
View
Most Expensive
B
MOH London
LG644447705 · Nov 1
£931 GBP
View
17 more retailers have this diamond
Prices start from £187 GBPSave up to £743 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
£187 GBP