Round|Lab Grown|IGI

1.23ct I IF Round Lab Grown Diamond

ID • I/IF • IGI LG837612222

Shape and cutting style on the report: Round brilliant

Certificate IGI LG837612222

Diamond specifications and retailer prices

From £154 GBP
$206 USD
As of October 29, 2026
Save £616 GBP (80%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £907 GBP at Rare Carat · As of October 21, 2026
View at Rare Carat

About this 1.23ct lab-grown round diamond

This 1.23ct lab-grown round sits in the classic one-carat band, graded I colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG837612222 or 837612222. Listed at 15 retailers as of October 29, 2026, with a 401% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
I
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837612222
Dimensions6.90 × 6.96 × 4.22 mm
L/W Ratio1.01
Girdle conditionFaceted
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 Light Blue
Top View
6.90 mm6.96 mm1.23 ctI / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837612222
Side View
Table 57.0%Crown 34.5°Girdle: MediumPavilion 40.6°Culet: NoneDepth 60.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £907 GBP|Low: £148 GBP|High: £907 GBP|Avg: £413 GBP
Rare Carat
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
October 30, 2026
Retailer 12£154 GBP
Retailer 15£172 GBP
Retailer 3£178 GBP
Retailer 11£191 GBP
Retailer 13£191 GBP
Retailer 4£265 GBP
Retailer 2£288 GBP
Retailer 9£323 GBP
Retailer 6£373 GBP
Retailer 14£613 GBP
Retailer 10£616 GBP
Retailer 7£653 GBP
Retailer 5£690 GBP
Retailer 8£770 GBP
Rare Carat£907 GBP

31 data points across 15 retailers

15 retailers£154 GBP to £770 GBP

A
Cheapest Retailer
-
£154 GBP
$206 USD
A
Retailer 2
-
£172 GBP
$231 USD
View
Final sale: no returns
A
Retailer 3
-
£178 GBP
$239 USD
View
A
Retailer 4
-
£191 GBP
$256 USD
View
A
Retailer 5
-
£191 GBP
$256 USD
View
B+
Retailer 6
-
£265 GBP
$355 USD
View
A
Retailer 7
-
£288 GBP
View
Retailer 8
-
£323 GBP
ZAR 6,987 ZAR
View
Price last confirmed 8 days ago
B+
Retailer 9
-
£373 GBP
$500 USD
View
B
Retailer 10
-
£613 GBP
$822 USD
View
B
Retailer 11
-
£616 GBP
$825 USD
View
B
Retailer 12
-
£653 GBP
$876 USD
View
B
Retailer 13
-
£690 GBP
$925 USD
View
B
Retailer 14
-
£770 GBP
View
Most Expensive
Rare Carat
VK9166_l_837612222 · Oct 21
£907 GBP
$1,215 USD
View
Price last confirmed 10 days ago
14 more retailers have this diamond
Prices start from £154 GBPSave up to £616 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
£154 GBP