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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 HK$1,240 HKD
$158 USD
As of October 30, 2026
Save HK$6,724 HKD (84%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: HK$7,963 HKD 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 HK$1,240 to HK$7,963, a HK$6,724 spread on the same certified stone. Rare Carat lists it at HK$7,963. 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
Colour
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

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: HK$7,963 HKD|Low: HK$1,193 HKD|High: HK$9,102 HKD|Avg: HK$3,773 HKD|-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
November 1, 2026
Retailer 14HK$1,240 HKD
Retailer 12HK$1,444 HKD
Retailer 13HK$1,538 HKD
Retailer 16HK$1,538 HKD
Retailer 6HK$1,699 HKD
Retailer 2HK$2,686 HKD
Retailer 10HK$2,783 HKD
Retailer 3HK$2,801 HKD
Retailer 5HK$4,001 HKD
Retailer 4HK$4,205 HKD
Retailer 8HK$4,921 HKD
Retailer 15HK$4,951 HKD
Retailer 11HK$5,233 HKD
Retailer 7HK$5,386 HKD
Retailer 9HK$7,244 HKD
Rare CaratHK$7,963 HKD

43 data points across 16 retailers

15 retailersHK$1,240 HKD to HK$7,963 HKD

A
Cheapest Retailer
-
HK$1,240 HKD
$158 USD
B+
Retailer 2
-
HK$1,444 HKD
$184 USD
View
B+
Retailer 3
-
HK$1,538 HKD
$196 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
HK$1,538 HKD
$196 USD
View
B+
Retailer 5
-
HK$2,686 HKD
£270 GBP
View
B+
Retailer 6
-
HK$2,783 HKD
£279 GBP
View
B
Retailer 7
-
HK$2,801 HKD
$357 USD
View
B+
Retailer 8
-
HK$4,001 HKD
$510 USD
View
B+
Retailer 9
-
HK$4,205 HKD
$536 USD
View
B
Retailer 10
-
HK$4,921 HKD
View
B+
Retailer 11
-
HK$4,951 HKD
$631 USD
View
B
Retailer 12
-
HK$5,233 HKD
$667 USD
View
B
Retailer 13
-
HK$5,386 HKD
$686 USD
View
B
Retailer 14
-
HK$7,244 HKD
£727 GBP
View
Most Expensive
B
Rare Carat
497145476_l_497145476 · Oct 28
HK$7,963 HKD
$1,015 USD
View
14 more retailers have this diamond
Prices start from HK$1,240 HKDSave up to HK$6,724 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
1.57ct Radiant
HK$1,240 HKD