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Radiant|Lab Grown|IGI

1.59ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG610312770

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

Certificate IGI LG610312770

Diamond specifications and retailer prices

From $1,506 AUD
As of November 5, 2026
Save $80 AUD (5%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $1,586 AUD at Brilliant Earth · As of November 6, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG610312770 or 610312770. Listed at 2 retailers as of November 5, 2026, with a relatively tight 5% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.4°
Pavilion angle35.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG610312770
Dimensions8.39 × 5.68 × 3.88 mm
L/W Ratio1.48
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
8.39 mm5.68 mm1.59 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG610312770
Side View
Table 65.0%Crown 44.4°Girdle: MediumPavilion 35.4°Culet: NoneDepth 68.3%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 5
Current: $1,586 AUD|Low: $210 AUD|High: $2,547 AUD|Avg: $1,198 AUD|-31.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
August 27, 2026
Retailer 4$210 AUD
Retailer 3$544 AUD
Retailer 7$630 AUD
Retailer 8$784 AUD
Retailer 10$926 AUD
Retailer 6$993 AUD
Retailer 5$997 AUD
Retailer 9$1,211 AUD
Brilliant Earth$1,586 AUD
Retailer 2$2,547 AUD

66 data points across 10 retailers

2 retailers$1,506 AUD to $1,586 AUD

B
Cheapest Retailer
-
$1,506 AUD
Most Expensive
B
Brilliant Earth
8682830Y · Nov 6
$1,586 AUD
$1,090 USD
View
1 more retailer has this diamond
Prices start from $1,506 AUDSave up to $80 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.

B
1.59ct Radiant
$1,506 AUD