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Radiant|Lab Grown|IGI

1.56ct D SI1 Radiant Lab Grown Diamond

GD • D/SI1 • IGI LG496117891

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

Certificate IGI LG496117891

Diamond specifications and retailer prices

From $221 CAD
$158 USD
As of October 30, 2026
Save $1,059 CAD (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,628 CAD at Rare Carat · As of September 6, 2026
View at Rare Carat

About this 1.56ct lab-grown radiant diamond

This 1.56ct 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 LG496117891 or 496117891. Listed at 16 retailers as of October 26, 2026, with a 479% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.56
Carat
D
Color
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.8°
Pavilion angle26.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG496117891
Dimensions7.88 × 5.75 × 3.63 mm
L/W Ratio1.37
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
7.88 mm5.75 mm1.56 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG496117891
Side View
Table 63.5%Crown 39.8°Girdle: STK-THKPavilion 26.7°Culet: NoneDepth 63.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $1,628 CAD|Low: $211 CAD|High: $1,628 CAD|Avg: $686 CAD
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$256 CAD
Retailer 13$273 CAD
Retailer 16$273 CAD
Retailer 6$301 CAD
Retailer 2$480 CAD
Retailer 9$494 CAD
Retailer 3$497 CAD
Retailer 5$707 CAD
Retailer 4$749 CAD
Retailer 8$878 CAD
Retailer 15$879 CAD
Retailer 11$928 CAD
Retailer 7$956 CAD
Retailer 10$1,280 CAD
Rare Carat$1,628 CAD

42 data points across 16 retailers

16 retailers$221 CAD to $1,280 CAD

A
Cheapest Retailer
-
$221 CAD
$158 USD
B+
Retailer 2
-
$256 CAD
$183 USD
View
A
Retailer 3
-
$273 CAD
$195 USD
View
B+
Retailer 4
-
$273 CAD
$195 USD
View
Retailer 5
-
$301 CAD
£170 GBP
View
Price last confirmed 49 days ago
B+
Retailer 6
-
$480 CAD
£270 GBP
View
B+
Retailer 7
-
$494 CAD
£278 GBP
View
B
Retailer 8
-
$497 CAD
$355 USD
View
B+
Retailer 9
-
$707 CAD
$505 USD
View
B+
Retailer 10
-
$749 CAD
$535 USD
View
B
Retailer 11
-
$878 CAD
HK$4,900 HKD
View
B
Retailer 12
-
$879 CAD
$628 USD
View
B
Retailer 13
-
$928 CAD
$663 USD
View
B
Retailer 14
-
$956 CAD
$683 USD
View
B
Retailer 15
-
$1,280 CAD
£720 GBP
View
Most Expensive
Rare Carat
KCV0711 · Sep 6
$1,628 CAD
$1,163 USD
View
Price last confirmed 54 days ago
15 more retailers have this diamond
Prices start from $221 CADSave up to $1,059 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
1.56ct Radiant
$221 CAD