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Heart|Lab Grown|IGI

1.00ct E SI1 Heart Lab Grown Diamond

ID • E/SI1 • IGI LG836642970

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG836642970

Diamond specifications and retailer prices

From £114 GBP
$152 USD
As of October 27, 2026
Save £667 GBP (85%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £781 GBP at Reve Diamonds · As of October 28, 2026
View at Reve Diamonds

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 top-tier cut grade and certified by IGI LG836642970 or 836642970. Listed at 16 retailers as of October 27, 2026, with prices from £114 to £781, a £667 spread on the same certified stone. Reve Diamonds lists it at £781. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.00
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836642970
Dimensions6.93 × 5.97 × 4.16 mm
L/W Ratio1.16
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
6.93 mm5.97 mm1.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836642970
Side View
Table 54.0%Crown 32°Girdle: MED-THKPavilion 40.1°Culet: NoneDepth 60.0%

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: Oct 27
Current: £246 GBP|Low: £110 GBP|High: £781 GBP|Avg: £360 GBP|+4.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Reve Diamonds
October 29, 2026
Retailer 10£114 GBP
Retailer 12£140 GBP
Retailer 5£145 GBP
Retailer 4£217 GBP
Retailer 1£246 GBP
Retailer 3£260 GBP
Retailer 8£269 GBP
Retailer 9£371 GBP
Retailer 11£428 GBP
Retailer 2£455 GBP
Retailer 6£507 GBP
Retailer 7£666 GBP
Reve Diamonds£781 GBP

40 data points across 13 retailers

16 retailers£114 GBP to £781 GBP

A
Cheapest Retailer
-
£114 GBP
$152 USD
A
Retailer 2
-
£132 GBP
$176 USD
View
Price last confirmed 30 days ago
A
Retailer 3
-
£140 GBP
$186 USD
View
Price last confirmed 32 days ago
A
Retailer 4
-
£140 GBP
$187 USD
View
Final sale: no returns
A
Retailer 5
-
£142 GBP
$189 USD
View
A
Retailer 6
-
£145 GBP
$193 USD
View
A
Retailer 7
-
£217 GBP
$289 USD
View
B+
Retailer 8
-
£246 GBP
View
B+
Retailer 9
-
£260 GBP
$346 USD
View
B+
Retailer 10
-
£269 GBP
View
B+
Retailer 11
-
£371 GBP
$494 USD
View
B
Retailer 12
-
£428 GBP
$570 USD
View
B
Retailer 13
-
£455 GBP
$606 USD
View
B
Retailer 14
-
£507 GBP
$675 USD
View
B
Retailer 15
-
£666 GBP
View
Most Expensive
B
Reve Diamonds
F0CE878DF · Oct 28
£781 GBP
$1,040 USD
View
15 more retailers have this diamond
Prices start from £114 GBPSave up to £667 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
£114 GBP