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Radiant|Lab Grown|IGI

1.57ct D SI1 Radiant Lab Grown Diamond

GD • D/SI1 • IGI LG497145476

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

Certificate IGI LG497145476

Diamond specifications and retailer prices

From $221 CAD
$158 USD
As of October 30, 2026
Save $1,197 CAD (84%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,418 CAD at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 1.57ct lab-grown radiant diamond

This 1.57ct 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 LG497145476 or 497145476. Listed at 15 retailers as of October 28, 2026, with prices from $221 to $1,418, a $1,197 spread on the same certified stone. Rare Carat lists it at $1,418. 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

1.57
Carat
D
Color
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.4°
Pavilion angle29.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG497145476
Dimensions7.72 × 5.68 × 3.86 mm
L/W Ratio1.36
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
7.72 mm5.68 mm1.57 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG497145476
Side View
Table 64.0%Crown 40.4°Girdle: Slightly ThickPavilion 29.4°Culet: NoneDepth 68.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $1,418 CAD|Low: $212 CAD|High: $1,621 CAD|Avg: $673 CAD|-12.5%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
October 30, 2026
Retailer 14$221 CAD
Retailer 12$257 CAD
Retailer 13$274 CAD
Retailer 16$274 CAD
Retailer 6$302 CAD
Retailer 2$482 CAD
Retailer 10$496 CAD
Retailer 3$499 CAD
Retailer 5$712 CAD
Retailer 4$749 CAD
Retailer 8$876 CAD
Retailer 15$881 CAD
Retailer 11$932 CAD
Retailer 7$959 CAD
Retailer 9$1,290 CAD
Rare Carat$1,418 CAD

42 data points across 16 retailers

15 retailers$221 CAD to $1,418 CAD

A
Cheapest Retailer
-
$221 CAD
$158 USD
B+
Retailer 2
-
$257 CAD
$184 USD
View
B+
Retailer 3
-
$274 CAD
$196 USD
View
A
Retailer 4
-
$274 CAD
$196 USD
View
B+
Retailer 5
-
$482 CAD
£272 GBP
View
B+
Retailer 6
-
$496 CAD
£279 GBP
View
B
Retailer 7
-
$499 CAD
$357 USD
View
B+
Retailer 8
-
$712 CAD
$510 USD
View
B+
Retailer 9
-
$749 CAD
$536 USD
View
B
Retailer 10
-
$876 CAD
HK$4,900 HKD
View
B+
Retailer 11
-
$881 CAD
$631 USD
View
B
Retailer 12
-
$932 CAD
$667 USD
View
B
Retailer 13
-
$959 CAD
$686 USD
View
B
Retailer 14
-
$1,290 CAD
£727 GBP
View
Most Expensive
B
Rare Carat
497145476_l_497145476 · Oct 28
$1,418 CAD
$1,015 USD
View
14 more retailers have this diamond
Prices start from $221 CADSave up to $1,197 CAD

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.

A
1.57ct Radiant
$221 CAD