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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 $225 AUD
$158 USD
As of October 30, 2026
Save $1,077 AUD (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,656 AUD 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 15 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
Colour
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

How it works →
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: $1,656 AUD|Low: $215 AUD|High: $1,656 AUD|Avg: $698 AUD
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 31, 2026
Retailer 14$225 AUD
Retailer 12$261 AUD
Retailer 13$278 AUD
Retailer 16$278 AUD
Retailer 6$307 AUD
Retailer 2$484 AUD
Retailer 9$502 AUD
Retailer 3$505 AUD
Retailer 5$719 AUD
Retailer 4$762 AUD
Retailer 8$893 AUD
Retailer 15$894 AUD
Retailer 11$944 AUD
Retailer 7$973 AUD
Retailer 10$1,302 AUD
Rare Carat$1,656 AUD

43 data points across 16 retailers

15 retailers$225 AUD to $1,302 AUD

A
Cheapest Retailer
-
$225 AUD
$158 USD
B+
Retailer 2
-
$261 AUD
$183 USD
View
B+
Retailer 3
-
$278 AUD
$195 USD
View
A
Retailer 4
-
$278 AUD
$195 USD
View
B+
Retailer 5
-
$484 AUD
£268 GBP
View
B+
Retailer 6
-
$502 AUD
£278 GBP
View
B
Retailer 7
-
$505 AUD
$355 USD
View
B+
Retailer 8
-
$719 AUD
$505 USD
View
B+
Retailer 9
-
$762 AUD
$535 USD
View
B
Retailer 10
-
$893 AUD
HK$4,900 HKD
View
B+
Retailer 11
-
$894 AUD
$628 USD
View
B
Retailer 12
-
$944 AUD
$663 USD
View
B
Retailer 13
-
$973 AUD
$683 USD
View
B
Retailer 14
-
$1,302 AUD
£720 GBP
View
Most Expensive
Rare Carat
KCV0711 · Sep 6
$1,656 AUD
$1,163 USD
View
Price last confirmed 55 days ago
14 more retailers have this diamond
Prices start from $225 AUDSave up to $1,077 AUD

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
$225 AUD