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Radiant|Lab Grown|IGI

1.05ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG474120580

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

Certificate IGI LG474120580

Diamond specifications and retailer prices

From $753 SGD
£464 GBP
As of October 31, 2026
Save $206 SGD (21%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $959 SGD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.05ct lab-grown radiant diamond

This 1.05ct lab-grown radiant sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG474120580 or 474120580. Listed at 2 retailers as of October 31, 2026, with prices from $753 to $959, a $206 spread on the same certified stone. Brilliant Earth lists it at $959. 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

1.05
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.9°
Pavilion angle32.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG474120580
Dimensions6.45 × 5.14 × 3.53 mm
L/W Ratio1.25
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.45 mm5.14 mm1.05 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG474120580
Side View
Table 65.0%Crown 42.9°Girdle: MED-STKPavilion 32.1°Culet: NoneDepth 68.7%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 31
Current: $959 SGD|Low: $388 SGD|High: $959 SGD|Avg: $662 SGD
Brilliant Earth
Retailer 2
Retailer 3
January 4, 2026
Retailer 2$388 SGD
Retailer 3$601 SGD
Brilliant Earth$959 SGD

10 data points across 3 retailers

2 retailers$753 SGD to $959 SGD

B+
Cheapest Retailer
-
$753 SGD
£464 GBP
Most Expensive
B
Brilliant Earth
4791918Y · Oct 31
$959 SGD
$750 USD
View
1 more retailer has this diamond
Prices start from $753 SGDSave up to $206 SGD

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+
1.05ct Radiant
$753 SGD