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Heart|Lab Grown|IGI

1.51ct D IF Heart Lab Grown Diamond

VG • D/IF • IGI LG816615642

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG816615642

Diamond specifications and retailer prices

From £213 GBP
$286 USD
As of October 30, 2026
Save £1,831 GBP (90%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,045 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.51ct lab-grown heart diamond

This 1.51ct lab-grown heart sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG816615642 or 816615642. Listed at 15 retailers as of October 30, 2026, with prices from £213 to £2,045, a £1,831 spread on the same certified stone. Brilliant Earth lists it at £2,045. 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

1.51
Carat
D
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle38°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816615642
Dimensions8.00 × 7.06 × 4.63 mm
L/W Ratio1.13
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
8.00 mm7.06 mm1.51 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816615642
Side View
Table 56.0%Crown 35.3°Girdle: STK-THKPavilion 38°Culet: NoneDepth 57.9%

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: £2,045 GBP|Low: £213 GBP|High: £2,493 GBP|Avg: £799 GBP|-13.8%
Brilliant Earth
Retailer 2
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Retailer 11
Retailer 12
Retailer 13
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Retailer 19
November 1, 2026
Retailer 7£213 GBP
Retailer 3£241 GBP
Retailer 18£247 GBP
Retailer 12£308 GBP
Retailer 19£331 GBP
Retailer 17£356 GBP
Retailer 15£358 GBP
Retailer 16£459 GBP
Retailer 10£531 GBP
Retailer 9£559 GBP
Retailer 14£680 GBP
Retailer 13£719 GBP
Retailer 8£766 GBP
Retailer 5£938 GBP
Retailer 6£1,034 GBP
Retailer 11£1,064 GBP
Retailer 2£1,169 GBP
Retailer 4£1,896 GBP
Brilliant Earth£2,045 GBP

23 data points across 19 retailers

15 retailers£213 GBP to £2,045 GBP

A
Cheapest Retailer
-
£213 GBP
$286 USD
A
Retailer 2
-
£241 GBP
$323 USD
View
Final sale: no returns
A
Retailer 3
-
£247 GBP
$331 USD
View
A
Retailer 4
-
£308 GBP
View
A
Retailer 5
-
£331 GBP
$444 USD
View
A
Retailer 6
-
£356 GBP
$477 USD
View
A
Retailer 7
-
£358 GBP
$480 USD
View
A
Retailer 8
-
£459 GBP
$615 USD
View
A
Retailer 9
-
£680 GBP
A$1,402 AUD
View
A
Retailer 10
-
£719 GBP
$964 USD
View
B+
Retailer 11
-
£938 GBP
$1,257 USD
View
B+
Retailer 12
-
£1,034 GBP
$1,385 USD
View
B+
Retailer 13
-
£1,169 GBP
View
B
Retailer 14
-
£1,896 GBP
$2,540 USD
View
Most Expensive
B
Brilliant Earth
21730607Y · Oct 31
£2,045 GBP
$2,740 USD
View
14 more retailers have this diamond
Prices start from £213 GBPSave up to £1,831 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
1.51ct Heart
£213 GBP