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Radiant|Lab Grown|IGI

1.65ct D FL Radiant Lab Grown Diamond

EX • D/FL • IGI LG818654486

Shape and cutting style on the report: Cut cornered square modified brilliant

Certificate IGI LG818654486

Diamond specifications and retailer prices

From £626 GBP
$840 USD
As of November 2, 2026
Save £3,502 GBP (85%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £4,128 GBP at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

About this 1.65ct lab-grown radiant diamond

This 1.65ct lab-grown radiant 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 LG818654486 or 818654486. Listed at 8 retailers as of November 2, 2026, with prices from £626 to £4,128, a £3,502 spread on the same certified stone. Do Amore Diamonds lists it at £4,128. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42°
Pavilion angle39.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818654486
Dimensions6.89 × 6.75 × 4.48 mm
L/W Ratio1.02
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
6.89 mm6.75 mm1.65 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818654486
Side View
Table 65.0%Crown 42°Girdle: MED-STKPavilion 39.6°Culet: NoneDepth 66.4%

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: Nov 2
Current: £4,128 GBP|Low: £626 GBP|High: £5,768 GBP|Avg: £2,280 GBP|-5.3%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 8£626 GBP
Retailer 6£766 GBP
Retailer 5£884 GBP
Retailer 2£999 GBP
Retailer 3£2,339 GBP
Retailer 7£2,932 GBP
Retailer 4£3,070 GBP
Retailer 9£3,101 GBP
Do Amore Diamonds£4,128 GBP

20 data points across 9 retailers

8 retailers£626 GBP to £4,128 GBP

A
Cheapest Retailer
-
£626 GBP
$840 USD
A
Retailer 2
-
£766 GBP
$1,028 USD
View
B+
Retailer 3
-
£884 GBP
$1,186 USD
View
B+
Retailer 4
-
£999 GBP
€1,277 EUR
View
B
Retailer 5
-
£2,339 GBP
View
B
Retailer 6
-
£2,932 GBP
$3,935 USD
View
B
Retailer 7
-
£3,070 GBP
$4,120 USD
View
Most Expensive
B
Do Amore Diamonds
27-F1202F580 · Nov 2
£4,128 GBP
$5,540 USD
View
7 more retailers have this diamond
Prices start from £626 GBPSave up to £3,502 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 Radiant
£626 GBP