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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 $280 NZD
$158 USD
As of October 30, 2026
Save $1,342 NZD (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,064 NZD 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

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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: $2,064 NZD|Low: $268 NZD|High: $2,064 NZD|Avg: $867 NZD
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
November 1, 2026
Retailer 14$280 NZD
Retailer 12$325 NZD
Retailer 13$346 NZD
Retailer 16$346 NZD
Retailer 6$382 NZD
Retailer 2$604 NZD
Retailer 9$626 NZD
Retailer 3$630 NZD
Retailer 5$896 NZD
Retailer 4$949 NZD
Retailer 8$1,113 NZD
Retailer 15$1,114 NZD
Retailer 11$1,176 NZD
Retailer 7$1,212 NZD
Retailer 10$1,622 NZD
Rare Carat$2,064 NZD

42 data points across 16 retailers

15 retailers$280 NZD to $1,622 NZD

A
Cheapest Retailer
-
$280 NZD
$158 USD
B+
Retailer 2
-
$325 NZD
$183 USD
View
Retailer 3
-
$346 NZD
$195 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
$346 NZD
$195 USD
View
B+
Retailer 5
-
$604 NZD
£268 GBP
View
B+
Retailer 6
-
$626 NZD
£278 GBP
View
B
Retailer 7
-
$630 NZD
$355 USD
View
B+
Retailer 8
-
$896 NZD
$505 USD
View
B+
Retailer 9
-
$949 NZD
$535 USD
View
B
Retailer 10
-
$1,113 NZD
HK$4,900 HKD
View
B+
Retailer 11
-
$1,114 NZD
$628 USD
View
B
Retailer 12
-
$1,176 NZD
$663 USD
View
B
Retailer 13
-
$1,212 NZD
$683 USD
View
B
Retailer 14
-
$1,622 NZD
£720 GBP
View
Most Expensive
Rare Carat
KCV0711 · Sep 6
$2,064 NZD
$1,163 USD
View
Price last confirmed 56 days ago
14 more retailers have this diamond
Prices start from $280 NZDSave up to $1,342 NZD

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
$280 NZD