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Radiant|Lab Grown|IGI

1.65ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG559296256

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

Certificate IGI LG559296256

Diamond specifications and retailer prices

From £134 GBP
$179 USD
As of October 27, 2026
Save £1,157 GBP (90%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,292 GBP at Do Amore Diamonds · As of October 29, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG559296256 or 559296256. Listed at 9 retailers as of October 27, 2026, with prices from £134 to £1,292, a £1,157 spread on the same certified stone. Do Amore Diamonds lists it at £1,292. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.65
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle49.1°
Pavilion angle36°
OriginLab Grown
Grading LabIGI
CertificateIGI LG559296256
Dimensions8.41 × 5.89 × 3.95 mm
L/W Ratio1.43
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.41 mm5.89 mm1.65 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG559296256
Side View
Table 66.5%Crown 49.1°Girdle: MediumPavilion 36°Culet: NoneDepth 67.1%

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 27
Current: £1,292 GBP|Low: £107 GBP|High: £1,322 GBP|Avg: £522 GBP|-2.3%
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
Retailer 14
October 29, 2026
Retailer 11£134 GBP
Retailer 13£154 GBP
Retailer 10£155 GBP
Retailer 9£295 GBP
Retailer 4£328 GBP
Retailer 5£409 GBP
Retailer 14£414 GBP
Retailer 6£499 GBP
Retailer 8£565 GBP
Retailer 3£585 GBP
Retailer 12£591 GBP
Retailer 7£725 GBP
Retailer 2£864 GBP
Do Amore Diamonds£1,292 GBP

16 data points across 14 retailers

9 retailers£134 GBP to £1,292 GBP

A
Cheapest Retailer
-
£134 GBP
$179 USD
A
Retailer 2
-
£154 GBP
$205 USD
View
Final sale: no returns
A
Retailer 3
-
£155 GBP
$207 USD
View
B+
Retailer 4
-
£295 GBP
$393 USD
View
B+
Retailer 5
-
£565 GBP
$753 USD
View
B+
Retailer 6
-
£591 GBP
$787 USD
View
B
Retailer 7
-
£725 GBP
$965 USD
View
Price last confirmed 10 days ago
B
Retailer 8
-
£864 GBP
View
Most Expensive
B
Do Amore Diamonds
27-07695C7B0 · Oct 29
£1,292 GBP
$1,720 USD
View
8 more retailers have this diamond
Prices start from £134 GBPSave up to £1,157 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
£134 GBP