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Round|Lab Grown|IGI

1.29ct E FL Round Lab Grown Diamond

ID • E/FL • IGI LG800680154

Shape and cutting style on the report: Round brilliant

Certificate IGI LG800680154

Diamond specifications and retailer prices

From £346 GBP
HK$3,600 HKD
As of October 30, 2026
Save £1,036 GBP (75%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,382 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.29ct lab-grown round diamond

This 1.29ct 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 LG800680154 or 800680154. Listed at 12 retailers as of October 29, 2026, with prices from £346 to £1,382, a £1,036 spread on the same certified stone. Brilliant Earth lists it at £1,382. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.29
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG800680154
Dimensions7.03 × 7.00 × 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
7.03 mm7.00 mm1.29 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG800680154
Side View
Table 57.0%Crown 34.1°Girdle: MediumPavilion 41.2°Culet: NoneDepth 61.5%

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 30
Current: £1,382 GBP|Low: £346 GBP|High: £1,427 GBP|Avg: £756 GBP|-3.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 7£346 GBP
Retailer 12£424 GBP
Retailer 8£487 GBP
Retailer 6£492 GBP
Retailer 2£535 GBP
Retailer 4£560 GBP
Retailer 10£569 GBP
Retailer 9£682 GBP
Retailer 11£1,000 GBP
Retailer 3£1,144 GBP
Retailer 5£1,211 GBP
Brilliant Earth£1,382 GBP

43 data points across 12 retailers

12 retailers£346 GBP to £1,382 GBP

A
Cheapest Retailer
-
£346 GBP
HK$3,600 HKD
A
Retailer 2
-
£424 GBP
$565 USD
View
A
Retailer 3
-
£487 GBP
$649 USD
View
A
Retailer 4
-
£492 GBP
€624 EUR
View
A
Retailer 5
-
£535 GBP
View
A
Retailer 6
-
£560 GBP
A$1,148 AUD
View
A
Retailer 7
-
£569 GBP
$758 USD
View
B+
Retailer 8
-
£682 GBP
$908 USD
View
B+
Retailer 9
-
£1,000 GBP
$1,331 USD
View
B
Retailer 10
-
£1,144 GBP
$1,523 USD
View
B+
Retailer 11
-
£1,211 GBP
View
Most Expensive
B
Brilliant Earth
21143562A · Oct 29
£1,382 GBP
$1,840 USD
View
11 more retailers have this diamond
Prices start from £346 GBPSave up to £1,036 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
1.29ct Round
£346 GBP