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Heart|Lab Grown|IGI

1.28ct D FL Heart Lab Grown Diamond

VG • D/FL • IGI LG836619541

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG836619541

Diamond specifications and retailer prices

From £266 GBP
$357 USD
As of October 30, 2026
Save £1,734 GBP (87%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £2,000 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.28ct lab-grown heart diamond

This 1.28ct lab-grown heart sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG836619541 or 836619541. Listed at 19 retailers as of October 30, 2026, with prices from £266 to £2,000, a £1,734 spread on the same certified stone. Brilliant Earth lists it at £2,000. 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

1.28
Carat
D
Colour
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.4°
Pavilion angle37.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836619541
Dimensions6.70 × 7.48 × 4.29 mm
L/W Ratio1.12
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
6.70 mm7.48 mm1.28 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836619541
Side View
Table 58.0%Crown 38.4°Girdle: STK-THKPavilion 37.6°Culet: NoneDepth 57.4%

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 30
Current: £2,000 GBP|Low: £266 GBP|High: £2,515 GBP|Avg: £799 GBP|-20.5%
Brilliant Earth
Retailer 2
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Retailer 4
Retailer 5
Retailer 6
Retailer 7
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Retailer 11
Retailer 12
Retailer 13
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Retailer 18
Retailer 19
November 2, 2026
Retailer 9£266 GBP
Retailer 3£309 GBP
Retailer 5£316 GBP
Retailer 17£330 GBP
Retailer 19£330 GBP
Retailer 13£340 GBP
Retailer 16£500 GBP
Retailer 7£513 GBP
Retailer 10£528 GBP
Retailer 2£570 GBP
Retailer 12£595 GBP
Retailer 4£661 GBP
Retailer 14£823 GBP
Retailer 18£1,061 GBP
Retailer 8£1,092 GBP
Retailer 11£1,193 GBP
Retailer 15£1,298 GBP
Retailer 6£1,375 GBP
Brilliant Earth£2,000 GBP

28 data points across 19 retailers

19 retailers£266 GBP to £2,000 GBP

A
Cheapest Retailer
-
£266 GBP
$357 USD
A
Retailer 2
-
£309 GBP
$414 USD
View
A
Retailer 3
-
£316 GBP
$424 USD
View
Final sale: no returns
A
Retailer 4
-
£330 GBP
$442 USD
View
Retailer 5
-
£330 GBP
$442 USD
View
Price last confirmed 8 days ago
A
Retailer 6
-
£340 GBP
View
A
Retailer 7
-
£500 GBP
$670 USD
View
A
Retailer 8
-
£513 GBP
$688 USD
View
A
Retailer 9
-
£528 GBP
$708 USD
View
A
Retailer 10
-
£570 GBP
ZAR 12,328 ZAR
View
B+
Retailer 11
-
£595 GBP
View
B+
Retailer 12
-
£661 GBP
$885 USD
View
B+
Retailer 13
-
£823 GBP
$1,103 USD
View
B
Retailer 14
-
£1,061 GBP
$1,422 USD
View
B
Retailer 15
-
£1,092 GBP
$1,463 USD
View
B
Retailer 16
-
£1,193 GBP
SGD 2,161 SGD
View
B
Retailer 17
-
£1,298 GBP
View
B
Retailer 18
-
£1,375 GBP
$1,842 USD
View
Most Expensive
B
Brilliant Earth
21695228A · Oct 31
£2,000 GBP
$2,680 USD
View
18 more retailers have this diamond
Prices start from £266 GBPSave up to £1,734 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
1.28ct Heart
£266 GBP