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Radiant|Lab Grown|IGI

1.50ct D SI1 Radiant Lab Grown Diamond

GD • D/SI1 • IGI LG551208487

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

Certificate IGI LG551208487

Diamond specifications and retailer prices

From €775 EUR
£684 GBP
As of November 2, 2026
1 retailer carries this diamond
Only listing: €775 EUR 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 1.5ct lab-grown radiant diamond

This 1.5ct 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 standard cut grade and certified by IGI LG551208487 or 551208487. Listed at a single retailer as of November 2, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.50
Carat
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45°
Pavilion angle31.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG551208487
Dimensions7.53 × 5.59 × 3.82 mm
L/W Ratio1.35
Culet sizePointed
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
7.53 mm5.59 mm1.50 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG551208487
Side View
Table 67.0%Crown 45°Girdle: MediumPavilion 31.2°Culet: NoneDepth 68.3%

Caratlytics Score

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C
Average
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Price History

Last verified: Nov 2
Current: €331 EUR|Low: €92 EUR|High: €1,034 EUR|Avg: €530 EUR
Retailer 1
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Retailer 11
July 29, 2026
Retailer 10€92 EUR
Retailer 5€114 EUR
Retailer 8€217 EUR
Retailer 9€294 EUR
Retailer 11€321 EUR
Retailer 1€331 EUR
Retailer 4€422 EUR
Retailer 7€529 EUR
Retailer 6€544 EUR
Retailer 3€703 EUR
Retailer 2€951 EUR

68 data points across 11 retailers

1 retailer

C
Diamond Quarter
1.5SI1DLG87DD4FN · Nov 2
€775 EUR
£684 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.

C
1.50ct Radiant
€775 EUR