CaratHunter
Plans
Heart|Lab Grown|IGI

1.91ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG818681481

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG818681481

Diamond specifications and retailer prices

From £528 GBP
$707 USD
As of October 30, 2026
Save £4,159 GBP (89%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £4,687 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 1.91ct lab-grown heart diamond

This 1.91ct lab-grown heart sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818681481 or 818681481. Listed at 12 retailers as of October 30, 2026, with prices from £528 to £4,687, a £4,159 spread on the same certified stone. Do Amore Diamonds lists it at £4,687. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.91
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818681481
Dimensions7.66 × 8.39 × 5.22 mm
L/W Ratio1.10
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
7.66 mm8.39 mm1.91 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818681481
Side View
Table 56.0%Crown 35.6°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 62.2%

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: £4,687 GBP|Low: £528 GBP|High: £8,060 GBP|Avg: £2,174 GBP|-41.9%
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
Retailer 13
October 30, 2026
Retailer 8£528 GBP
Retailer 13£574 GBP
Retailer 3£761 GBP
Retailer 9£995 GBP
Retailer 4£996 GBP
Retailer 6£1,143 GBP
Retailer 11£1,440 GBP
Retailer 10£1,508 GBP
Retailer 12£1,899 GBP
Retailer 7£2,546 GBP
Retailer 2£3,351 GBP
Retailer 5£4,176 GBP
Do Amore Diamonds£4,687 GBP

25 data points across 13 retailers

12 retailers£528 GBP to £4,687 GBP

A
Cheapest Retailer
-
£528 GBP
$707 USD
A
Retailer 2
-
£574 GBP
$769 USD
View
A
Retailer 3
-
£761 GBP
$1,020 USD
View
A
Retailer 4
-
£995 GBP
$1,333 USD
View
A
Retailer 5
-
£996 GBP
$1,335 USD
View
B+
Retailer 6
-
£1,143 GBP
€1,459 EUR
View
B+
Retailer 7
-
£1,440 GBP
A$2,968 AUD
View
B+
Retailer 8
-
£1,508 GBP
$2,020 USD
View
B+
Retailer 9
-
£1,899 GBP
$2,545 USD
View
B
Retailer 10
-
£2,546 GBP
View
B
Retailer 11
-
£3,351 GBP
$4,490 USD
View
Most Expensive
B
Do Amore Diamonds
27-B1165FDF8 · Oct 31
£4,687 GBP
$6,280 USD
View
11 more retailers have this diamond
Prices start from £528 GBPSave up to £4,159 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
1.91ct Heart
£528 GBP