CaratHunter
Plans
Heart|Lab Grown|IGI

1.28ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG818681475

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG818681475

Diamond specifications and retailer prices

From £236 GBP
$317 USD
As of October 30, 2026
Save £1,858 GBP (89%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,094 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

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 top-tier cut grade and certified by IGI LG818681475 or 818681475. Listed at 11 retailers as of October 30, 2026, with prices from £236 to £2,094, a £1,858 spread on the same certified stone. Do Amore Diamonds lists it at £2,094. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818681475
Dimensions6.51 × 7.59 × 4.46 mm
L/W Ratio1.17
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
6.51 mm7.59 mm1.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818681475
Side View
Table 58.0%Crown 32.2°Girdle: STK-THKPavilion 40.6°Culet: NoneDepth 58.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £2,094 GBP|Low: £236 GBP|High: £3,078 GBP|Avg: £1,094 GBP|-32.0%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 6£236 GBP
Retailer 10£274 GBP
Retailer 11£432 GBP
Retailer 8£475 GBP
Retailer 3£519 GBP
Retailer 12£726 GBP
Retailer 7£858 GBP
Retailer 9£1,039 GBP
Retailer 5£1,269 GBP
Retailer 2£1,960 GBP
Retailer 4£1,966 GBP
Do Amore Diamonds£2,094 GBP

22 data points across 12 retailers

11 retailers£236 GBP to £2,094 GBP

A
Cheapest Retailer
-
£236 GBP
$317 USD
A
Retailer 2
-
£274 GBP
$368 USD
View
A
Retailer 3
-
£432 GBP
$580 USD
View
A
Retailer 4
-
£475 GBP
$637 USD
View
A
Retailer 5
-
£519 GBP
$696 USD
View
B+
Retailer 6
-
£726 GBP
A$1,498 AUD
View
B+
Retailer 7
-
£858 GBP
$1,152 USD
View
B+
Retailer 8
-
£1,039 GBP
$1,394 USD
View
B
Retailer 9
-
£1,269 GBP
View
B
Retailer 10
-
£1,960 GBP
$2,630 USD
View
Most Expensive
B
Do Amore Diamonds
27-396AFF3E3 · Oct 31
£2,094 GBP
$2,810 USD
View
10 more retailers have this diamond
Prices start from £236 GBPSave up to £1,858 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
£236 GBP