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Radiant|Lab Grown|IGI

1.50ct D SI1 Radiant Lab Grown Diamond

VG • D/SI1 • IGI LG492142566

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

Certificate IGI LG492142566

Diamond specifications and retailer prices

From $807 USD
£636 GBP
As of October 31, 2026
2 retailers carry this diamond
Only listing: $807 USD 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 very-good cut grade and certified by IGI LG492142566 or 492142566. Listed at 2 retailers as of October 31, 2026. 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
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492142566
Dimensions7.92 × 5.63 × 3.91 mm
L/W Ratio1.41
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
7.92 mm5.63 mm1.50 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492142566
Side View
Table 65.5%Crown 44.5°Girdle: Slightly ThickPavilionCulet: NoneDepth 69.4%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 31
Current: $688 USD|Low: $474 USD|High: $2,090 USD|Avg: $958 USD|-29.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
March 23, 2026
Retailer 3$474 USD
Retailer 1$688 USD
Retailer 2$695 USD
Retailer 5$1,108 USD
Retailer 4$2,090 USD

38 data points across 5 retailers

2 retailers

B
Diamond Quarter
1.5SI1DLG66982DN · Oct 31
$807 USD
£636 GBP
View

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B
1.50ct Radiant
$807 USD