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Heart|Lab Grown|IGI

1.65ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG846663395

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG846663395

Diamond specifications and retailer prices

From £506 GBP
$678 USD
As of October 30, 2026
Save £2,644 GBP (84%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,150 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.65ct lab-grown heart diamond

This 1.65ct 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 LG846663395 or 846663395. Listed at 13 retailers as of October 30, 2026, with prices from £506 to £3,150, a £2,644 spread on the same certified stone. Brilliant Earth lists it at £3,150. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.65
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.9°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846663395
Dimensions6.99 × 7.92 × 4.94 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
6.99 mm7.92 mm1.65 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846663395
Side View
Table 59.0%Crown 37.9°Girdle: STK-THKPavilion 40.3°Culet: NoneDepth 62.4%

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: £3,150 GBP|Low: £506 GBP|High: £3,941 GBP|Avg: £1,548 GBP|-20.1%
Brilliant Earth
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 31, 2026
Retailer 6£506 GBP
Retailer 4£551 GBP
Retailer 7£666 GBP
Retailer 10£705 GBP
Retailer 8£720 GBP
Retailer 3£955 GBP
Retailer 13£1,017 GBP
Retailer 2£1,499 GBP
Retailer 11£1,650 GBP
Retailer 5£2,317 GBP
Retailer 9£2,486 GBP
Retailer 12£2,600 GBP
Brilliant Earth£3,150 GBP

5 data points across 13 retailers

13 retailers£506 GBP to £3,150 GBP

A
Cheapest Retailer
-
£506 GBP
$678 USD
A
Retailer 2
-
£551 GBP
$738 USD
View
A
Retailer 3
-
£666 GBP
View
A
Retailer 4
-
£705 GBP
$944 USD
View
A
Retailer 5
-
£720 GBP
$965 USD
View
B+
Retailer 6
-
£955 GBP
$1,279 USD
View
B+
Retailer 7
-
£1,017 GBP
$1,363 USD
View
B+
Retailer 8
-
£1,499 GBP
$2,009 USD
View
B
Retailer 9
-
£1,650 GBP
$2,211 USD
View
B
Retailer 10
-
£2,317 GBP
$3,105 USD
View
B
Retailer 11
-
£2,486 GBP
View
B
Retailer 12
-
£2,600 GBP
$3,484 USD
View
Most Expensive
B
Brilliant Earth
22337110A · Oct 30
£3,150 GBP
$4,220 USD
View
12 more retailers have this diamond
Prices start from £506 GBPSave up to £2,644 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
1.65ct Heart
£506 GBP