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Radiant|Lab Grown|IGI

1.51ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG620429993

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

Certificate IGI LG620429993

Diamond specifications and retailer prices

From $1,776 AUD
As of November 6, 2026
Save $407 AUD (19%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $2,183 AUD at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

About this 1.51ct lab-grown radiant diamond

This 1.51ct 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 LG620429993 or 620429993. Listed at 2 retailers as of November 5, 2026, with prices from $1,776 to $2,183, a $407 spread on the same certified stone. Diamond Quarter lists it at $2,183. 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

1.51
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.4°
Pavilion angle35.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620429993
Dimensions8.26 × 5.56 × 3.78 mm
L/W Ratio1.49
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
8.26 mm5.56 mm1.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620429993
Side View
Table 62.0%Crown 44.4°Girdle: MED-STKPavilion 35.3°Culet: NoneDepth 68.0%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: $624 AUD|Low: $616 AUD|High: $1,776 AUD|Avg: $1,086 AUD|+1.4%
Retailer 1
Retailer 2
Retailer 3
January 11, 2026
Retailer 1$624 AUD
Retailer 2$911 AUD
Retailer 3$1,776 AUD

13 data points across 3 retailers

2 retailers$1,776 AUD to $2,183 AUD

B
Cheapest Retailer
-
$1,776 AUD
Most Expensive
B
Diamond Quarter
1.51SI1FLG937D4BN · Nov 5
$2,183 AUD
£1,181 GBP
View
1 more retailer has this diamond
Prices start from $1,776 AUDSave up to $407 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
1.51ct Radiant
$1,776 AUD