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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 $221 AUD
$155 USD
As of October 27, 2026
Save $1,901 AUD (90%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $2,121 AUD 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 $221 to $2,121, a $1,901 spread on the same certified stone. Do Amore Diamonds lists it at $2,121. 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: $2,121 AUD|Low: $221 AUD|High: $2,249 AUD|Avg: $980 AUD|-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$221 AUD
Retailer 7$256 AUD
Retailer 14$262 AUD
Retailer 11$500 AUD
Retailer 3$589 AUD
Retailer 6$727 AUD
Retailer 4$870 AUD
Retailer 8$932 AUD
Retailer 10$974 AUD
Retailer 12$1,017 AUD
Retailer 5$1,318 AUD
Retailer 2$1,425 AUD
Retailer 13$1,495 AUD
Do Amore Diamonds$2,121 AUD

21 data points across 14 retailers

10 retailers$221 AUD to $2,121 AUD

A
Cheapest Retailer
-
$221 AUD
$155 USD
A
Retailer 2
-
$256 AUD
$180 USD
View
A
Retailer 3
-
$262 AUD
$184 USD
View
Final sale: no returns
B+
Retailer 4
-
$500 AUD
$351 USD
View
B+
Retailer 5
-
$932 AUD
$655 USD
View
B+
Retailer 6
-
$974 AUD
$684 USD
View
B+
Retailer 7
-
$1,017 AUD
$715 USD
View
B+
Retailer 8
-
$1,425 AUD
£788 GBP
View
B
Retailer 9
-
$1,495 AUD
$1,050 USD
View
Most Expensive
B
Do Amore Diamonds
27-102D9F72E · Oct 30
$2,121 AUD
$1,490 USD
View
9 more retailers have this diamond
Prices start from $221 AUDSave up to $1,901 AUD

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
$221 AUD