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Radiant|Lab Grown|IGI

1.59ct D SI1 Radiant Lab Grown Diamond

EX • D/SI1 • IGI LG739595146

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

Certificate IGI LG739595146

Diamond specifications and retailer prices

From $259 AUD
$182 USD
As of October 30, 2026
Save $1,592 AUD (86%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,851 AUD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.59ct lab-grown radiant diamond

This 1.59ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG739595146 or 739595146. Listed at 17 retailers as of October 30, 2026, with prices from $259 to $1,851, a $1,592 spread on the same certified stone. Brilliant Earth lists it at $1,851. 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

1.59
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.7°
Pavilion angle36°
OriginLab Grown
Grading LabIGI
CertificateIGI LG739595146
Dimensions7.95 × 5.86 × 3.95 mm
L/W Ratio1.36
Culet sizePointed
Top View
7.95 mm5.86 mm1.59 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG739595146
Side View
Table 65.0%Crown 45.7°Girdle: MediumPavilion 36°Culet: NoneDepth 67.4%

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 30
Current: $1,851 AUD|Low: $248 AUD|High: $1,908 AUD|Avg: $780 AUD|-3.0%
Brilliant Earth
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
November 2, 2026
Retailer 10$259 AUD
Retailer 14$300 AUD
Retailer 3$320 AUD
Retailer 11$320 AUD
Retailer 6$434 AUD
Retailer 8$543 AUD
Retailer 2$578 AUD
Retailer 5$637 AUD
Retailer 4$695 AUD
Retailer 9$810 AUD
Retailer 12$1,031 AUD
Retailer 13$1,481 AUD
Retailer 7$1,499 AUD
Brilliant Earth$1,851 AUD

45 data points across 14 retailers

17 retailers$259 AUD to $1,851 AUD

A
Cheapest Retailer
-
$259 AUD
$182 USD
A
Retailer 2
-
$300 AUD
$211 USD
View
Retailer 3
-
$320 AUD
$225 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
$320 AUD
$225 USD
View
A
Retailer 5
-
$364 AUD
HK$2,000 HKD
View
B+
Retailer 6
-
$434 AUD
$305 USD
View
A
Retailer 7
-
$543 AUD
€363 EUR
View
A
Retailer 8
-
$578 AUD
£320 GBP
View
A
Retailer 9
-
$637 AUD
$448 USD
View
B+
Retailer 10
-
$695 AUD
$488 USD
View
B+
Retailer 11
-
$755 AUD
$530 USD
View
B+
Retailer 12
-
$810 AUD
$569 USD
View
B+
Retailer 13
-
$1,031 AUD
$724 USD
View
B+
Retailer 14
-
$1,051 AUD
SGD 998 SGD
View
Retailer 15
-
$1,481 AUD
$1,040 USD
View
Price last confirmed 32 days ago
B
Retailer 16
-
$1,499 AUD
£829 GBP
View
Most Expensive
B
Brilliant Earth
20675146A · Oct 31
$1,851 AUD
$1,300 USD
View
16 more retailers have this diamond
Prices start from $259 AUDSave up to $1,592 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
1.59ct Radiant
$259 AUD