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Radiant|Lab Grown|IGI

1.83ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG655439671

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

Certificate IGI LG655439671

Diamond specifications and retailer prices

From $858 SGD
£528 GBP
As of October 29, 2026
1 retailer carries this diamond
Only listing: $858 SGD at Diamond Quarter
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Diamond Quarter

About this 1.83ct lab-grown radiant diamond

This 1.83ct 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 LG655439671 or 655439671. Listed at a single retailer as of October 29, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

1.83
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.1°
Pavilion angle34.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG655439671
Dimensions8.31 × 6.16 × 4.10 mm
L/W Ratio1.35
Top View
8.31 mm6.16 mm1.83 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG655439671
Side View
Table 66.0%Crown 44.1°Girdle: MediumPavilion 34.7°Culet: NoneDepth 66.6%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 29
Current: $509 SGD|Low: $509 SGD|High: $3,516 SGD|Avg: $2,128 SGD
Retailer 1
Retailer 2
January 4, 2026
Retailer 1$509 SGD
Retailer 2$3,516 SGD

7 data points across 2 retailers

1 retailer

B+
Diamond Quarter
1.83SI1DLG718D59N · Oct 29
$858 SGD
£528 GBP
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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+
1.83ct Radiant
$858 SGD