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Heart|Lab Grown|IGI

1.23ct E VS1 Heart Lab Grown Diamond

VG • E/VS1 • IGI LG845615199

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG845615199

Diamond specifications and retailer prices

From £180 GBP
$241 USD
As of October 30, 2026
Save £682 GBP (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £862 GBP at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 1.23ct lab-grown heart diamond

This 1.23ct lab-grown heart sits in the classic one-carat band, graded E colour (colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG845615199 or 845615199. Listed at 11 retailers as of October 30, 2026, with prices from £180 to £862, a £682 spread on the same certified stone. Reve Diamonds lists it at £862. 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

1.23
Carat
E
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG845615199
Dimensions6.42 × 7.57 × 4.31 mm
L/W Ratio1.18
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
6.42 mm7.57 mm1.23 ctE / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG845615199
Side View
Table 57.0%Crown 34.6°Girdle: STK-THKPavilion 39.2°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 30
Current: £687 GBP|Low: £178 GBP|High: £879 GBP|Avg: £474 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Reve Diamonds
October 30, 2026
Retailer 3£180 GBP
Retailer 6£219 GBP
Retailer 4£305 GBP
Retailer 5£316 GBP
Retailer 7£332 GBP
Retailer 10£441 GBP
Retailer 2£581 GBP
Retailer 8£600 GBP
Retailer 1£687 GBP
Retailer 9£809 GBP
Reve Diamonds£862 GBP

10 data points across 11 retailers

11 retailers£180 GBP to £862 GBP

A
Cheapest Retailer
-
£180 GBP
$241 USD
Final sale: no returns
A
Retailer 2
-
£219 GBP
View
A
Retailer 3
-
£305 GBP
$408 USD
View
A
Retailer 4
-
£316 GBP
View
B+
Retailer 5
-
£332 GBP
$445 USD
View
B+
Retailer 6
-
£441 GBP
A$909 AUD
View
B
Retailer 7
-
£581 GBP
$779 USD
View
B
Retailer 8
-
£600 GBP
$803 USD
View
B
Retailer 9
-
£687 GBP
$920 USD
View
B
Retailer 10
-
£809 GBP
View
Most Expensive
B
Reve Diamonds
73A5127AF · Oct 30
£862 GBP
$1,155 USD
View
10 more retailers have this diamond
Prices start from £180 GBPSave up to £682 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
1.23ct Heart
£180 GBP