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Round|Lab Grown|IGI

1.20ct E FL Round Lab Grown Diamond

EX • E/FL • IGI LG840633367

Shape and cutting style on the report: Round brilliant

Certificate IGI LG840633367

Diamond specifications and retailer prices

From £190 GBP
$255 USD
As of October 29, 2026
Save £1,387 GBP (88%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,577 GBP at Helzberg Diamonds · As of October 30, 2026
View at Helzberg Diamonds

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG840633367 or 840633367. Listed at 22 retailers as of October 29, 2026, with prices from £190 to £1,577, a £1,387 spread on the same certified stone. Helzberg Diamonds lists it at £1,577. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.20
Carat
E
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840633367
Dimensions6.73 × 6.78 × 4.24 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
6.73 mm6.78 mm1.20 ctE / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840633367
Side View
Table 58.0%Crown 35.9°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.8%

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: Oct 29
Current: £1,577 GBP|Low: £190 GBP|High: £1,577 GBP|Avg: £600 GBP
Helzberg Diamonds
Retailer 2
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October 30, 2026
Retailer 10£190 GBP
Retailer 11£213 GBP
Retailer 5£221 GBP
Retailer 6£236 GBP
Retailer 14£236 GBP
Retailer 18£355 GBP
Retailer 2£382 GBP
Retailer 16£391 GBP
Retailer 7£394 GBP
Retailer 17£406 GBP
Retailer 8£423 GBP
Retailer 13£449 GBP
Retailer 9£484 GBP
Retailer 4£725 GBP
Retailer 15£759 GBP
Retailer 3£759 GBP
Retailer 12£797 GBP
Retailer 22£826 GBP
Retailer 19£947 GBP
Retailer 21£1,116 GBP
Retailer 20£1,261 GBP
Helzberg Diamonds£1,577 GBP

22 data points across 22 retailers

22 retailers£190 GBP to £1,577 GBP

A
Cheapest Retailer
-
£190 GBP
$255 USD
A
Retailer 2
-
£213 GBP
$286 USD
View
Final sale: no returns
A
Retailer 3
-
£221 GBP
$296 USD
View
A
Retailer 4
-
£236 GBP
$316 USD
View
A
Retailer 5
-
£236 GBP
$316 USD
View
A
Retailer 6
-
£355 GBP
$475 USD
View
A
Retailer 7
-
£382 GBP
View
A
Retailer 8
-
£391 GBP
€499 EUR
View
A
Retailer 9
-
£394 GBP
$528 USD
View
A
Retailer 10
-
£406 GBP
ZAR 8,780 ZAR
View
A
Retailer 11
-
£423 GBP
$567 USD
View
A
Retailer 12
-
£449 GBP
View
B+
Retailer 13
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£484 GBP
$649 USD
View
B+
Retailer 14
-
£725 GBP
$972 USD
View
B+
Retailer 15
-
£759 GBP
$1,017 USD
View
B+
Retailer 16
-
£759 GBP
SGD 1,375 SGD
View
B+
Retailer 17
-
£797 GBP
$1,068 USD
View
B+
Retailer 18
-
£826 GBP
$1,107 USD
View
B+
Retailer 19
-
£947 GBP
View
Retailer 20
-
£1,116 GBP
$1,495 USD
View
Price last confirmed 12 days ago
B
Retailer 21
-
£1,261 GBP
$1,690 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOKGMJJJMN · Oct 30
£1,577 GBP
$2,113 USD
View
21 more retailers have this diamond
Prices start from £190 GBPSave up to £1,387 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
1.20ct Round
£190 GBP