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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 HK$1,240 HKD
$158 USD
As of October 30, 2026
Save HK$5,934 HKD (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: HK$9,128 HKD 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: HK$9,128 HKD|Low: HK$1,185 HKD|High: HK$9,128 HKD|Avg: HK$3,840 HKD
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 14HK$1,240 HKD
Retailer 12HK$1,436 HKD
Retailer 13HK$1,530 HKD
Retailer 16HK$1,530 HKD
Retailer 6HK$1,690 HKD
Retailer 2HK$2,669 HKD
Retailer 9HK$2,769 HKD
Retailer 3HK$2,785 HKD
Retailer 5HK$3,962 HKD
Retailer 4HK$4,197 HKD
Retailer 8HK$4,921 HKD
Retailer 15HK$4,927 HKD
Retailer 11HK$5,202 HKD
Retailer 7HK$5,360 HKD
Retailer 10HK$7,174 HKD
Rare CaratHK$9,128 HKD

43 data points across 16 retailers

15 retailersHK$1,240 HKD to HK$7,174 HKD

A
Cheapest Retailer
-
HK$1,240 HKD
$158 USD
B+
Retailer 2
-
HK$1,436 HKD
$183 USD
View
Retailer 3
-
HK$1,530 HKD
$195 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
HK$1,530 HKD
$195 USD
View
B+
Retailer 5
-
HK$2,669 HKD
£268 GBP
View
B+
Retailer 6
-
HK$2,769 HKD
£278 GBP
View
B
Retailer 7
-
HK$2,785 HKD
$355 USD
View
B+
Retailer 8
-
HK$3,962 HKD
$505 USD
View
B+
Retailer 9
-
HK$4,197 HKD
$535 USD
View
B
Retailer 10
-
HK$4,921 HKD
View
B+
Retailer 11
-
HK$4,927 HKD
$628 USD
View
B
Retailer 12
-
HK$5,202 HKD
$663 USD
View
B
Retailer 13
-
HK$5,360 HKD
$683 USD
View
B
Retailer 14
-
HK$7,174 HKD
£720 GBP
View
Most Expensive
Rare Carat
KCV0711 · Sep 6
HK$9,128 HKD
$1,163 USD
View
Price last confirmed 56 days ago
14 more retailers have this diamond
Prices start from HK$1,240 HKDSave up to HK$5,934 HKD

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
HK$1,240 HKD