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Round|Lab Grown|IGI

1.21ct G IF Round Lab Grown Diamond

ID • G/IF • IGI LG656491314

Shape and cutting style on the report: Round brilliant

Certificate IGI LG656491314

Diamond specifications and retailer prices

From £158 GBP
As of November 3, 2026
Save £1,072 GBP (87%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,230 GBP at Brilliant Earth · As of October 26, 2026
View at Brilliant Earth

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded G colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG656491314 or 656491314. Listed at 22 retailers as of November 3, 2026, with a 679% 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

1.21
Carat
G
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG656491314
Dimensions6.90 × 6.92 × 4.13 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.90 mm6.92 mm1.21 ctG / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG656491314
Side View
Table 60.0%Crown 33.9°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 59.8%

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: Nov 3
Current: £1,230 GBP|Low: £158 GBP|High: £1,230 GBP|Avg: £474 GBP
Brilliant Earth
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
Retailer 16
Retailer 17
Retailer 18
November 5, 2026
Retailer 10£164 GBP
Retailer 3£177 GBP
Retailer 9£183 GBP
Retailer 7£196 GBP
Retailer 4£263 GBP
Retailer 17£330 GBP
Retailer 15£337 GBP
Retailer 2£357 GBP
Retailer 18£376 GBP
Retailer 14£479 GBP
Retailer 5£608 GBP
Retailer 6£629 GBP
Retailer 13£631 GBP
Retailer 8£667 GBP
Retailer 16£668 GBP
Retailer 11£781 GBP
Retailer 12£848 GBP
Brilliant Earth£1,230 GBP

43 data points across 18 retailers

22 retailers£158 GBP to £1,230 GBP

A
Cheapest Retailer
-
£158 GBP
Retailer 2
-
£164 GBP
View
Price last confirmed 10 days ago
A
Retailer 3
-
£177 GBP
View
Final sale: no returns
Retailer 4
-
£183 GBP
View
Price last confirmed 9 days ago
Retailer 5
-
£196 GBP
View
Price last confirmed 9 days ago
Retailer 6
-
£204 GBP
View
Price last confirmed 11 days ago
B+
Retailer 7
-
£263 GBP
View
A
Retailer 8
-
£330 GBP
View
A
Retailer 9
-
£337 GBP
View
A
Retailer 10
-
£357 GBP
View
A
Retailer 11
-
£376 GBP
View
B+
Retailer 12
-
£479 GBP
View
B+
Retailer 13
-
£514 GBP
View
B+
Retailer 14
-
£608 GBP
View
Retailer 15
-
£629 GBP
View
Price last confirmed 9 days ago
B
Retailer 16
-
£631 GBP
View
B
Retailer 17
-
£667 GBP
View
B
Retailer 18
-
£668 GBP
View
B+
Retailer 19
-
£781 GBP
View
B
Retailer 20
-
£848 GBP
View
B
Retailer 21
-
£1,230 GBP
View
Most Expensive
Brilliant Earth
20628276A · Oct 26
£1,230 GBP
$1,660 USD
View
Price last confirmed 9 days ago
21 more retailers have this diamond
Prices start from £158 GBPSave up to £1,072 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
1.21ct Round
£158 GBP