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Radiant|Lab Grown|IGI

3.51ct D SI1 Radiant Lab Grown Diamond

EX • D/SI1 • IGI LG678517147

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

Certificate IGI LG678517147

Diamond specifications and retailer prices

From $1,905 CAD
£1,074 GBP
As of October 29, 2026
1 retailer carries this diamond
Only listing: $1,905 CAD 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 3.51ct lab-grown radiant diamond

This 3.51ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG678517147 or 678517147. 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

3.51
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.3°
Pavilion angle36.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG678517147
Dimensions10.85 × 7.51 × 5.13 mm
L/W Ratio1.44
Top View
10.85 mm7.51 mm3.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG678517147
Side View
Table 65.0%Crown 40.3°Girdle: MediumPavilion 36.3°CuletDepth 68.3%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 29
Current: $1,905 CAD|Low: $1,905 CAD|High: $1,905 CAD|Avg: $1,905 CAD
September 26, 2026
Diamond Quarter$1,905 CAD

1 data point across 1 retailer

1 retailer

B
Diamond Quarter
3.51SI1DLG474C37N · Oct 29
$1,905 CAD
£1,074 GBP
View

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B
3.51ct Radiant
$1,905 CAD