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Radiant|Lab Grown|IGI

1.64ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG546205676

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

Certificate IGI LG546205676

Diamond specifications and retailer prices

From £116 GBP
$155 USD
As of October 27, 2026
Save £996 GBP (90%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,112 GBP at Do Amore Diamonds · As of October 30, 2026
View at Do Amore Diamonds

About this 1.64ct lab-grown radiant diamond

This 1.64ct lab-grown radiant sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG546205676 or 546205676. Listed at 10 retailers as of October 27, 2026, with prices from £116 to £1,112, a £996 spread on the same certified stone. Do Amore Diamonds lists it at £1,112. 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

1.64
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.9°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG546205676
Dimensions8.14 × 5.75 × 3.99 mm
L/W Ratio1.42
Culet sizeNone
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
8.14 mm5.75 mm1.64 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG546205676
Side View
Table 61.0%Crown 42.9°Girdle: MED-STKPavilion 34.9°Culet: NoneDepth 69.4%

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 27
Current: £1,112 GBP|Low: £116 GBP|High: £1,179 GBP|Avg: £514 GBP|-5.7%
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 9£116 GBP
Retailer 7£134 GBP
Retailer 14£137 GBP
Retailer 11£262 GBP
Retailer 3£309 GBP
Retailer 6£381 GBP
Retailer 4£456 GBP
Retailer 8£489 GBP
Retailer 10£510 GBP
Retailer 12£533 GBP
Retailer 5£691 GBP
Retailer 2£747 GBP
Retailer 13£784 GBP
Do Amore Diamonds£1,112 GBP

21 data points across 14 retailers

10 retailers£116 GBP to £1,112 GBP

A
Cheapest Retailer
-
£116 GBP
$155 USD
A
Retailer 2
-
£134 GBP
$180 USD
View
A
Retailer 3
-
£137 GBP
$184 USD
View
Final sale: no returns
B+
Retailer 4
-
£262 GBP
$351 USD
View
B+
Retailer 5
-
£489 GBP
$655 USD
View
B+
Retailer 6
-
£510 GBP
$684 USD
View
B+
Retailer 7
-
£533 GBP
$715 USD
View
B+
Retailer 8
-
£747 GBP
View
B
Retailer 9
-
£784 GBP
$1,050 USD
View
Most Expensive
B
Do Amore Diamonds
27-102D9F72E · Oct 30
£1,112 GBP
$1,490 USD
View
9 more retailers have this diamond
Prices start from £116 GBPSave up to £996 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
1.64ct Radiant
£116 GBP