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Round|Lab Grown|IGI

1.28ct F IF Round Lab Grown Diamond

ID • F/IF • IGI LG850688192

Shape and cutting style on the report: Round brilliant

Certificate IGI LG850688192

Diamond specifications and retailer prices

From £200 GBP
$268 USD
As of November 1, 2026
Save £792 GBP (80%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £992 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.28ct lab-grown round diamond

This 1.28ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG850688192 or 850688192. Listed at 19 retailers as of November 1, 2026, with prices from £200 to £992, a £792 spread on the same certified stone. MOH London lists it at £992. 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
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG850688192
Dimensions6.96 × 6.99 × 4.24 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.96 mm6.99 mm1.28 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG850688192
Side View
Table 58.0%Crown 35.4°Girdle: THN-MEDPavilion 40.4°Culet: NoneDepth 60.9%

Caratlytics Score

How it works →
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 1
Current: £992 GBP|Low: £200 GBP|High: £998 GBP|Avg: £539 GBP|-0.6%
MOH London
Retailer 2
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Retailer 19
November 2, 2026
Retailer 5£200 GBP
Retailer 18£231 GBP
Retailer 15£248 GBP
Retailer 8£277 GBP
Retailer 10£334 GBP
Retailer 4£366 GBP
Retailer 14£400 GBP
Retailer 6£400 GBP
Retailer 12£427 GBP
Retailer 7£437 GBP
Retailer 2£474 GBP
Retailer 19£532 GBP
Retailer 17£761 GBP
Retailer 16£796 GBP
Retailer 11£811 GBP
Retailer 9£834 GBP
Retailer 3£892 GBP
Retailer 13£892 GBP
MOH London£992 GBP

6 data points across 19 retailers

19 retailers£200 GBP to £992 GBP

A
Cheapest Retailer
-
£200 GBP
$268 USD
A
Retailer 2
-
£231 GBP
$310 USD
View
A
Retailer 3
-
£248 GBP
$332 USD
View
A
Retailer 4
-
£277 GBP
HK$2,900 HKD
View
A
Retailer 5
-
£334 GBP
$448 USD
View
A
Retailer 6
-
£366 GBP
$490 USD
View
A
Retailer 7
-
£400 GBP
View
A
Retailer 8
-
£400 GBP
€511 EUR
View
A
Retailer 9
-
£427 GBP
ZAR 9,244 ZAR
View
A
Retailer 10
-
£437 GBP
$585 USD
View
A
Retailer 11
-
£474 GBP
View
B+
Retailer 12
-
£532 GBP
$713 USD
View
B
Retailer 13
-
£761 GBP
$1,020 USD
View
B
Retailer 14
-
£796 GBP
$1,067 USD
View
B
Retailer 15
-
£811 GBP
SGD 1,469 SGD
View
B
Retailer 16
-
£834 GBP
$1,118 USD
View
B
Retailer 17
-
£892 GBP
$1,195 USD
View
B
Retailer 18
-
£892 GBP
$1,195 USD
View
Most Expensive
B
MOH London
LG850688192 · Nov 1
£992 GBP
View
18 more retailers have this diamond
Prices start from £200 GBPSave up to £792 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 Round
£200 GBP