Heart|Lab Grown|IGI

1.20ct E VVS1 Heart Lab Grown Diamond

VG • E/VVS1 • IGI LG831679846

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG831679846

Diamond specifications and retailer prices

From £154 GBP
$206 USD
As of October 30, 2026
Save £630 GBP (80%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £784 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.2ct lab-grown heart diamond

This 1.2ct lab-grown heart sits in the classic one-carat band, graded E colour (colourless) and VVS1 clarity (very-very-slightly-included), with a very-good cut grade and certified by IGI LG831679846 or 831679846. Listed at 13 retailers as of October 29, 2026, with prices from £154 to £784, a £630 spread on the same certified stone. Brilliant Earth lists it at £784. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.20
Carat
E
Colour
VVS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831679846
Dimensions6.53 × 7.28 × 4.23 mm
L/W Ratio1.11
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
6.53 mm7.28 mm1.20 ctE / VVS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831679846
Side View
Table 57.0%Crown 35.3°Girdle: MED-STKPavilion 39.3°Culet: NoneDepth 58.1%

Caratlytics Score

How it works →
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: Oct 30
Current: £784 GBP|Low: £154 GBP|High: £784 GBP|Avg: £433 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
October 31, 2026
Retailer 7£154 GBP
Retailer 4£172 GBP
Retailer 3£190 GBP
Retailer 9£234 GBP
Retailer 8£330 GBP
Retailer 10£351 GBP
Retailer 6£372 GBP
Retailer 12£410 GBP
Retailer 2£615 GBP
Retailer 5£620 GBP
Retailer 11£648 GBP
Retailer 13£653 GBP
Brilliant Earth£784 GBP

3 data points across 13 retailers

13 retailers£154 GBP to £784 GBP

A
Cheapest Retailer
-
£154 GBP
$206 USD
A
Retailer 2
-
£172 GBP
$231 USD
View
Final sale: no returns
A
Retailer 3
-
£190 GBP
$255 USD
View
A
Retailer 4
-
£234 GBP
View
B+
Retailer 5
-
£330 GBP
$442 USD
View
B+
Retailer 6
-
£351 GBP
View
B+
Retailer 7
-
£372 GBP
$499 USD
View
B+
Retailer 8
-
£410 GBP
$549 USD
View
B
Retailer 9
-
£615 GBP
$824 USD
View
B
Retailer 10
-
£620 GBP
SGD 1,123 SGD
View
B
Retailer 11
-
£648 GBP
$868 USD
View
B
Retailer 12
-
£653 GBP
$874 USD
View
Most Expensive
B
Brilliant Earth
22348517A · Oct 29
£784 GBP
$1,050 USD
View
12 more retailers have this diamond
Prices start from £154 GBPSave up to £630 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 Heart
£154 GBP