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Round|Lab Grown|IGI

1.28ct E FL Round Lab Grown Diamond

ID • E/FL • IGI LG825665171

Shape and cutting style on the report: Round brilliant

Certificate IGI LG825665171

Diamond specifications and retailer prices

From £203 GBP
$270 USD
As of October 29, 2026
Save £1,171 GBP (85%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £1,374 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.28ct lab-grown round diamond

This 1.28ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG825665171 or 825665171. Listed at 19 retailers as of October 29, 2026, with prices from £203 to £1,374, a £1,171 spread on the same certified stone. Brilliant Earth lists it at £1,374. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825665171
Dimensions6.94 × 6.92 × 4.32 mm
L/W Ratio1.00
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
6.94 mm6.92 mm1.28 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825665171
Side View
Table 56.0%Crown 35.6°Girdle: MediumPavilion 40.8°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
A+
Exceptional
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: £1,374 GBP|Low: £228 GBP|High: £1,374 GBP|Avg: £638 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
October 30, 2026
Retailer 6£228 GBP
Retailer 3£235 GBP
Retailer 11£372 GBP
Retailer 9£414 GBP
Retailer 4£417 GBP
Retailer 10£432 GBP
Retailer 2£441 GBP
Retailer 5£547 GBP
Retailer 15£773 GBP
Retailer 14£808 GBP
Retailer 7£847 GBP
Retailer 13£887 GBP
Retailer 8£1,014 GBP
Retailer 12£1,198 GBP
Brilliant Earth£1,374 GBP

40 data points across 15 retailers

19 retailers£203 GBP to £1,374 GBP

A+
Cheapest Retailer
-
£203 GBP
$270 USD
A
Retailer 2
-
£228 GBP
$303 USD
View
Final sale: no returns
A
Retailer 3
-
£235 GBP
$313 USD
View
A
Retailer 4
-
£252 GBP
$335 USD
View
A
Retailer 5
-
£252 GBP
$335 USD
View
A
Retailer 6
-
£372 GBP
$495 USD
View
A
Retailer 7
-
£414 GBP
€525 EUR
View
A
Retailer 8
-
£417 GBP
$555 USD
View
A
Retailer 9
-
£432 GBP
ZAR 9,301 ZAR
View
A
Retailer 10
-
£441 GBP
View
A
Retailer 11
-
£547 GBP
$729 USD
View
B+
Retailer 12
-
£773 GBP
$1,029 USD
View
B+
Retailer 13
-
£808 GBP
SGD 1,454 SGD
View
B+
Retailer 14
-
£809 GBP
$1,077 USD
View
B+
Retailer 15
-
£847 GBP
$1,128 USD
View
B+
Retailer 16
-
£887 GBP
$1,181 USD
View
B+
Retailer 17
-
£1,014 GBP
View
Retailer 18
-
£1,198 GBP
$1,595 USD
View
Price last confirmed 12 days ago
Most Expensive
B
Brilliant Earth
21433907A · Oct 29
£1,374 GBP
$1,830 USD
View
18 more retailers have this diamond
Prices start from £203 GBPSave up to £1,171 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+
1.28ct Round
£203 GBP