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Round|Lab Grown|IGI

1.23ct F IF Round Lab Grown Diamond

ID • F/IF • IGI LG628409000

Shape and cutting style on the report: Round brilliant

Certificate IGI LG628409000

Diamond specifications and retailer prices

From £168 GBP
$223 USD
As of October 29, 2026
Save £1,443 GBP (90%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,611 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG628409000 or 628409000. Listed at 21 retailers as of October 29, 2026, with prices from £168 to £1,611, a £1,443 spread on the same certified stone. Do Amore Diamonds lists it at £1,611. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
F
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG628409000
Dimensions6.86 × 6.80 × 4.23 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.86 mm6.80 mm1.23 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG628409000
Side View
Table 57.0%Crown 36.1°Girdle: MediumPavilion 40.3°Culet: NoneDepth 62.0%

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: Oct 29
Current: £1,611 GBP|Low: £166 GBP|High: £1,656 GBP|Avg: £535 GBP|-2.7%
Do Amore Diamonds
Retailer 2
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October 29, 2026
Retailer 18£168 GBP
Retailer 5£187 GBP
Retailer 19£195 GBP
Retailer 17£208 GBP
Retailer 20£208 GBP
Retailer 9£280 GBP
Retailer 4£373 GBP
Retailer 10£382 GBP
Retailer 7£391 GBP
Retailer 14£395 GBP
Retailer 15£433 GBP
Retailer 12£459 GBP
Retailer 16£561 GBP
Retailer 6£579 GBP
Retailer 13£667 GBP
Retailer 11£868 GBP
Retailer 3£888 GBP
Retailer 2£927 GBP
Retailer 8£954 GBP
Do Amore Diamonds£1,611 GBP

30 data points across 20 retailers

21 retailers£168 GBP to £1,611 GBP

A
Cheapest Retailer
-
£168 GBP
$223 USD
A
Retailer 2
-
£187 GBP
$249 USD
View
Final sale: no returns
A
Retailer 3
-
£195 GBP
$259 USD
View
A
Retailer 4
-
£208 GBP
$277 USD
View
A
Retailer 5
-
£280 GBP
$372 USD
View
A
Retailer 6
-
£318 GBP
HK$3,300 HKD
View
Price last confirmed 55 days ago
A
Retailer 7
-
£373 GBP
View
Price last confirmed 12 days ago
A
Retailer 8
-
£382 GBP
$508 USD
View
A
Retailer 9
-
£391 GBP
$519 USD
View
A
Retailer 10
-
£395 GBP
ZAR 8,486 ZAR
View
B+
Retailer 11
-
£433 GBP
View
B+
Retailer 12
-
£459 GBP
A$938 AUD
View
B+
Retailer 13
-
£561 GBP
A$1,147 AUD
View
B+
Retailer 14
-
£579 GBP
$769 USD
View
B+
Retailer 15
-
£667 GBP
A$1,364 AUD
View
B
Retailer 16
-
£850 GBP
$1,130 USD
View
Price last confirmed 11 days ago
B
Retailer 17
-
£868 GBP
$1,154 USD
View
B
Retailer 18
-
£888 GBP
$1,180 USD
View
Price last confirmed 11 days ago
B
Retailer 19
-
£927 GBP
View
B
Retailer 20
-
£954 GBP
$1,268 USD
View
Most Expensive
B
Do Amore Diamonds
27-610A9F749 · Oct 29
£1,611 GBP
$2,140 USD
View
20 more retailers have this diamond
Prices start from £168 GBPSave up to £1,443 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
£168 GBP