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Round|Lab Grown|IGI

1.27ct G IF Round Lab Grown Diamond

ID • G/IF • IGI LG778698667

Shape and cutting style on the report: Round brilliant

Certificate IGI LG778698667

Diamond specifications and retailer prices

From £248 GBP
As of November 4, 2026
Save £1,041 GBP (81%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,289 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.27ct lab-grown round diamond

This 1.27ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded G colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG778698667 or 778698667. Listed at 8 retailers as of November 4, 2026, with prices from £248 to £1,289, a £1,041 spread on the same certified stone. Brilliant Earth lists it at £1,289. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.27
Carat
G
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778698667
Dimensions6.96 × 6.94 × 4.27 mm
L/W Ratio1.00
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 Faint Blue
Top View
6.96 mm6.94 mm1.27 ctG / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778698667
Side View
Table 56.0%Crown 33.7°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.4%

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 4
Current: £1,289 GBP|Low: £248 GBP|High: £1,326 GBP|Avg: £645 GBP|-2.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 4, 2026
Retailer 5£248 GBP
Retailer 2£333 GBP
Retailer 7£341 GBP
Retailer 4£423 GBP
Retailer 8£632 GBP
Retailer 6£660 GBP
Retailer 3£861 GBP
Retailer 9£988 GBP
Brilliant Earth£1,289 GBP

40 data points across 9 retailers

8 retailers£248 GBP to £1,289 GBP

B+
Cheapest Retailer
-
£248 GBP
A
Retailer 2
-
£333 GBP
View
A
Retailer 3
-
£423 GBP
View
B+
Retailer 4
-
£632 GBP
View
B+
Retailer 5
-
£660 GBP
View
B+
Retailer 6
-
£861 GBP
View
Retailer 7
-
£988 GBP
View
Price last confirmed 94 days ago
Most Expensive
B
Brilliant Earth
18099752A · Nov 4
£1,289 GBP
$1,740 USD
View
7 more retailers have this diamond
Prices start from £248 GBPSave up to £1,041 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
1.27ct Round
£248 GBP