CaratHunter
Plans
Round|Lab Grown|IGI

1.20ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG830644653

Shape and cutting style on the report: Round brilliant

Certificate IGI LG830644653

Diamond specifications and retailer prices

From £256 GBP
$343 USD
As of October 29, 2026
Save £1,729 GBP (87%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £1,985 GBP at Brilliant Earth · As of October 29, 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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG830644653 or 830644653. Listed at 24 retailers as of October 29, 2026, with prices from £256 to £1,985, a £1,729 spread on the same certified stone. Brilliant Earth lists it at £1,985. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830644653
Dimensions6.86 × 6.92 × 4.16 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
6.86 mm6.92 mm1.20 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830644653
Side View
Table 57.0%Crown 33.7°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.4%

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: £1,985 GBP|Low: £246 GBP|High: £2,015 GBP|Avg: £785 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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
Retailer 23
Retailer 24
October 30, 2026
Retailer 4£256 GBP
Retailer 5£287 GBP
Retailer 7£297 GBP
Retailer 6£317 GBP
Retailer 10£317 GBP
Retailer 16£386 GBP
Retailer 9£422 GBP
Retailer 24£425 GBP
Retailer 3£470 GBP
Retailer 18£525 GBP
Retailer 19£539 GBP
Retailer 22£576 GBP
Retailer 20£602 GBP
Retailer 13£632 GBP
Retailer 17£761 GBP
Retailer 14£840 GBP
Retailer 8£1,046 GBP
Retailer 11£1,126 GBP
Retailer 12£1,227 GBP
Retailer 15£1,234 GBP
Retailer 2£1,239 GBP
Retailer 21£1,371 GBP
Retailer 23£1,918 GBP
Brilliant Earth£1,985 GBP

35 data points across 24 retailers

24 retailers£256 GBP to £1,985 GBP

A
Cheapest Retailer
-
£256 GBP
$343 USD
A
Retailer 2
-
£287 GBP
$384 USD
View
Final sale: no returns
A
Retailer 3
-
£297 GBP
$398 USD
View
A
Retailer 4
-
£317 GBP
$425 USD
View
A
Retailer 5
-
£317 GBP
$425 USD
View
A
Retailer 6
-
£386 GBP
$517 USD
View
A
Retailer 7
-
£422 GBP
$566 USD
View
A
Retailer 8
-
£425 GBP
$570 USD
View
A
Retailer 9
-
£470 GBP
$630 USD
View
A
Retailer 10
-
£472 GBP
$633 USD
View
B+
Retailer 11
-
£539 GBP
€688 EUR
View
B+
Retailer 12
-
£576 GBP
$772 USD
View
B+
Retailer 13
-
£602 GBP
ZAR 13,030 ZAR
View
B+
Retailer 14
-
£632 GBP
View
B+
Retailer 15
-
£761 GBP
$1,019 USD
View
B+
Retailer 16
-
£840 GBP
$1,126 USD
View
B
Retailer 17
-
£1,046 GBP
CA$1,946 CAD
View
B
Retailer 18
-
£1,126 GBP
$1,509 USD
View
B
Retailer 19
-
£1,227 GBP
$1,643 USD
View
B
Retailer 20
-
£1,234 GBP
$1,654 USD
View
B
Retailer 21
-
£1,239 GBP
$1,661 USD
View
B
Retailer 22
-
£1,371 GBP
View
B
Retailer 23
-
£1,918 GBP
$2,570 USD
View
Most Expensive
B
Brilliant Earth
21654344A · Oct 29
£1,985 GBP
$2,660 USD
View
23 more retailers have this diamond
Prices start from £256 GBPSave up to £1,729 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
£256 GBP