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Round|Lab Grown|IGI

1.27ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG818644610

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818644610

Diamond specifications and retailer prices

From £378 GBP
$507 USD
As of October 29, 2026
Save £1,749 GBP (82%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £2,127 GBP at Brilliant Earth · As of October 29, 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 D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818644610 or 818644610. Listed at 22 retailers as of October 29, 2026, with prices from £378 to £2,127, a £1,749 spread on the same certified stone. Brilliant Earth lists it at £2,127. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.27
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818644610
Dimensions6.93 × 6.86 × 4.28 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
Top View
6.93 mm6.86 mm1.27 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818644610
Side View
Table 59.0%Crown 35.5°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.1%

Caratlytics Score

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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: £2,127 GBP|Low: £363 GBP|High: £2,127 GBP|Avg: £955 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
October 30, 2026
Retailer 13£378 GBP
Retailer 14£423 GBP
Retailer 4£469 GBP
Retailer 5£469 GBP
Retailer 10£571 GBP
Retailer 8£706 GBP
Retailer 2£747 GBP
Retailer 7£778 GBP
Retailer 9£807 GBP
Retailer 12£1,096 GBP
Retailer 3£1,198 GBP
Retailer 6£1,488 GBP
Retailer 11£1,962 GBP
Brilliant Earth£2,127 GBP

37 data points across 14 retailers

22 retailers£378 GBP to £2,127 GBP

A
Cheapest Retailer
-
£378 GBP
$507 USD
A
Retailer 2
-
£423 GBP
$567 USD
View
Final sale: no returns
A
Retailer 3
-
£424 GBP
$568 USD
View
A
Retailer 4
-
£469 GBP
$629 USD
View
Retailer 5
-
£469 GBP
$629 USD
View
Price last confirmed 14 days ago
A
Retailer 6
-
£516 GBP
HK$5,400 HKD
View
A
Retailer 7
-
£571 GBP
$765 USD
View
A
Retailer 8
-
£631 GBP
$845 USD
View
B+
Retailer 9
-
£642 GBP
$860 USD
View
B+
Retailer 10
-
£706 GBP
€901 EUR
View
B+
Retailer 11
-
£747 GBP
View
B+
Retailer 12
-
£778 GBP
View
B+
Retailer 13
-
£807 GBP
ZAR 17,463 ZAR
View
B
Retailer 14
-
£1,096 GBP
$1,469 USD
View
Retailer 15
-
£1,198 GBP
$1,605 USD
View
Price last confirmed 23 days ago
B
Retailer 16
-
£1,234 GBP
$1,654 USD
View
B
Retailer 17
-
£1,488 GBP
SGD 2,695 SGD
View
B
Retailer 18
-
£1,528 GBP
$2,047 USD
View
B
Retailer 19
-
£1,623 GBP
$2,174 USD
View
B
Retailer 20
-
£1,749 GBP
$2,343 USD
View
B
Retailer 21
-
£1,962 GBP
View
Most Expensive
B
Brilliant Earth
21133537A · Oct 29
£2,127 GBP
$2,850 USD
View
21 more retailers have this diamond
Prices start from £378 GBPSave up to £1,749 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
£378 GBP