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Round|Lab Grown|IGI

1.20ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG843613181

Shape and cutting style on the report: Round brilliant

Certificate IGI LG843613181

Diamond specifications and retailer prices

From £286 GBP
HK$3,000 HKD
As of November 1, 2026
Save £817 GBP (74%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,103 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG843613181 or 843613181. Listed at 14 retailers as of October 31, 2026, with prices from £286 to £1,103, a £817 spread on the same certified stone. Brilliant Earth lists it at £1,103. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.20
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843613181
Dimensions6.85 × 6.88 × 4.13 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
6.85 mm6.88 mm1.20 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG843613181
Side View
Table 58.0%Crown 34.1°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 60.2%

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: Nov 1
Current: £1,103 GBP|Low: £286 GBP|High: £1,103 GBP|Avg: £611 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
November 1, 2026
Retailer 3£286 GBP
Retailer 4£350 GBP
Retailer 7£411 GBP
Retailer 9£425 GBP
Retailer 2£470 GBP
Retailer 11£526 GBP
Retailer 12£551 GBP
Retailer 6£831 GBP
Retailer 5£834 GBP
Retailer 13£924 GBP
Retailer 8£997 GBP
Retailer 10£1,002 GBP
Brilliant Earth£1,103 GBP

10 data points across 13 retailers

14 retailers£286 GBP to £1,103 GBP

A
Cheapest Retailer
-
£286 GBP
HK$3,000 HKD
A
Retailer 2
-
£350 GBP
$470 USD
View
A
Retailer 3
-
£411 GBP
€525 EUR
View
A
Retailer 4
-
£425 GBP
ZAR 9,222 ZAR
View
A
Retailer 5
-
£470 GBP
View
B+
Retailer 6
-
£526 GBP
$706 USD
View
B+
Retailer 7
-
£551 GBP
$739 USD
View
B
Retailer 8
-
£831 GBP
A$1,716 AUD
View
B
Retailer 9
-
£834 GBP
$1,119 USD
View
B
Retailer 10
-
£850 GBP
$1,140 USD
View
B
Retailer 11
-
£924 GBP
$1,240 USD
View
B
Retailer 12
-
£997 GBP
View
B
Retailer 13
-
£1,002 GBP
$1,345 USD
View
Most Expensive
B
Brilliant Earth
22234357A · Oct 31
£1,103 GBP
$1,480 USD
View
13 more retailers have this diamond
Prices start from £286 GBPSave up to £817 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
£286 GBP