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Radiant|Lab Grown|IGI

1.55ct E SI1 Radiant Lab Grown Diamond

EX • E/SI1 • IGI LG641483559

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

Certificate IGI LG641483559

Diamond specifications and retailer prices

From $259 AUD
$182 USD
As of October 30, 2026
Save $1,356 AUD (84%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $1,615 AUD at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 1.55ct lab-grown radiant diamond

This 1.55ct 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 LG641483559 or 641483559. Listed at 19 retailers as of October 30, 2026, with prices from $259 to $1,615, a $1,356 spread on the same certified stone. Reve Diamonds lists it at $1,615. 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

1.55
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG641483559
Dimensions8.24 × 5.68 × 3.73 mm
L/W Ratio1.45
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
8.24 mm5.68 mm1.55 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG641483559
Side View
Table 63.0%Crown 43°Girdle: MED-STKPavilion 35.1°Culet: NoneDepth 65.7%

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: $1,438 AUD|Low: $242 AUD|High: $1,637 AUD|Avg: $694 AUD|-12.2%
Retailer 1
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
Reve Diamonds
October 30, 2026
Retailer 8$259 AUD
Retailer 6$313 AUD
Retailer 13$320 AUD
Retailer 7$330 AUD
Retailer 10$411 AUD
Retailer 2$526 AUD
Retailer 9$565 AUD
Retailer 11$578 AUD
Retailer 4$801 AUD
Retailer 5$1,005 AUD
Retailer 12$1,107 AUD
Retailer 3$1,231 AUD
Retailer 1$1,438 AUD
Retailer 14$1,470 AUD
Reve Diamonds$1,615 AUD

36 data points across 15 retailers

19 retailers$259 AUD to $1,615 AUD

A
Cheapest Retailer
-
$259 AUD
$182 USD
A
Retailer 2
-
$292 AUD
$205 USD
View
A
Retailer 3
-
$313 AUD
$220 USD
View
A
Retailer 4
-
$320 AUD
$225 USD
View
A
Retailer 5
-
$330 AUD
$232 USD
View
Final sale: no returns
A
Retailer 6
-
$411 AUD
£228 GBP
View
Retailer 7
-
$526 AUD
€352 EUR
View
Price last confirmed 7 days ago
B+
Retailer 8
-
$565 AUD
$397 USD
View
A
Retailer 9
-
$578 AUD
£320 GBP
View
A
Retailer 10
-
$663 AUD
$466 USD
View
B+
Retailer 11
-
$792 AUD
$556 USD
View
B+
Retailer 12
-
$801 AUD
$563 USD
View
B
Retailer 13
-
$1,005 AUD
$706 USD
View
B+
Retailer 14
-
$1,107 AUD
$778 USD
View
B+
Retailer 15
-
$1,124 AUD
£621 GBP
View
Retailer 16
-
$1,231 AUD
$865 USD
View
Price last confirmed 11 days ago
B
Retailer 17
-
$1,438 AUD
$1,010 USD
View
B
Retailer 18
-
$1,470 AUD
£813 GBP
View
Most Expensive
B
Reve Diamonds
27F484ECB · Oct 30
$1,615 AUD
$1,135 USD
View
18 more retailers have this diamond
Prices start from $259 AUDSave up to $1,356 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
1.55ct Radiant
$259 AUD