Round|Lab Grown|IGI

1.23ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG794602614

Shape and cutting style on the report: Round brilliant

Certificate IGI LG794602614

Diamond specifications and retailer prices

From £122 GBP
As of October 30, 2026
Save £287 GBP (70%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £748 GBP at Reve Diamonds · As of October 25, 2026
View at Reve Diamonds

About this 1.23ct lab-grown round diamond

This 1.23ct lab-grown round sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG794602614 or 794602614. Listed at 21 retailers as of October 30, 2026, with a 235% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.23
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle36.7°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG794602614
Dimensions6.84 × 6.91 × 4.16 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.84 mm6.91 mm1.23 ctF / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG794602614
Side View
Table 60.0%Crown 36.7°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 60.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £227 GBP|Low: £114 GBP|High: £788 GBP|Avg: £328 GBP|-5.3%
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
Reve Diamonds
November 6, 2026
Retailer 4£117 GBP
Retailer 14£117 GBP
Retailer 6£137 GBP
Retailer 5£146 GBP
Retailer 3£177 GBP
Retailer 10£221 GBP
Retailer 1£227 GBP
Retailer 8£284 GBP
Retailer 13£319 GBP
Retailer 7£331 GBP
Retailer 12£374 GBP
Retailer 9£409 GBP
Retailer 2£460 GBP
Retailer 11£610 GBP
Reve Diamonds£748 GBP

38 data points across 15 retailers

21 retailers£122 GBP to £409 GBP

Retailer 1
-
£103 GBP
Price last confirmed 23 days ago
Retailer 2
-
£105 GBP
View
Price last confirmed 11 days ago
Retailer 3
-
£117 GBP
View
Price last confirmed 27 days ago
A
Retailer 4
-
£122 GBP
View
Retailer 5
-
£127 GBP
View
Price last confirmed 23 days ago
Retailer 6
-
£137 GBP
View
Price last confirmed 28 days ago
Retailer 7
-
£146 GBP
View
Price last confirmed 35 days ago
B+
Retailer 8
-
£177 GBP
View
Retailer 9
-
£221 GBP
View
Price last confirmed 9 days ago
A
Retailer 10
-
£227 GBP
View
B+
Retailer 11
-
£284 GBP
View
B+
Retailer 12
-
£310 GBP
View
Retailer 13
-
£319 GBP
View
Price last confirmed 11 days ago
B+
Retailer 14
-
£331 GBP
View
Retailer 15
-
£374 GBP
View
Price last confirmed 11 days ago
Retailer 16
-
£408 GBP
View
Price last confirmed 23 days ago
B+
Retailer 17
-
£409 GBP
View
Retailer 18
-
£460 GBP
View
Price last confirmed 10 days ago
Retailer 19
-
£469 GBP
View
Price last confirmed 37 days ago
Retailer 20
-
£610 GBP
View
Price last confirmed 11 days ago
Most Expensive
Reve Diamonds
4FD743642 · Oct 25
£748 GBP
$1,007 USD
View
Price last confirmed 12 days ago
20 more retailers have this diamond
Prices start from £122 GBPSave up to £287 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
1.23ct Round
£122 GBP