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Heart|Lab Grown|IGI

1.00ct E SI1 Heart Lab Grown Diamond

VG • E/SI1 • IGI LG839608663

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG839608663

Diamond specifications and retailer prices

From £126 GBP
$168 USD
As of October 28, 2026
Save £535 GBP (81%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £661 GBP at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1ct lab-grown heart diamond

This 1ct lab-grown heart sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG839608663 or 839608663. Listed at 3 retailers as of October 28, 2026, with prices from £126 to £661, a £535 spread on the same certified stone. Brilliant Earth lists it at £661. 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

1.00
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle38.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839608663
Dimensions6.08 × 7.10 × 4.04 mm
L/W Ratio1.17
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.08 mm7.10 mm1.00 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839608663
Side View
Table 60.0%Crown 34.1°Girdle: STK-THKPavilion 38.7°Culet: NoneDepth 56.9%

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 28
Current: £661 GBP|Low: £126 GBP|High: £683 GBP|Avg: £427 GBP|-3.3%
Brilliant Earth
Retailer 2
Retailer 3
October 29, 2026
Retailer 3£126 GBP
Retailer 2£253 GBP
Brilliant Earth£661 GBP

29 data points across 3 retailers

3 retailers£126 GBP to £661 GBP

A
Cheapest Retailer
-
£126 GBP
$168 USD
Final sale: no returns
B+
Retailer 2
-
£253 GBP
View
Most Expensive
B
Brilliant Earth
21542097A · Oct 28
£661 GBP
$880 USD
View
2 more retailers have this diamond
Prices start from £126 GBPSave up to £535 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
1.00ct Heart
£126 GBP