CaratHunter
Plans
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 $225 AUD
$158 USD
As of October 30, 2026
Save $1,220 AUD (84%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,445 AUD 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 $225 to $1,445, a $1,220 spread on the same certified stone. Rare Carat lists it at $1,445. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $1,445 AUD|Low: $216 AUD|High: $1,651 AUD|Avg: $686 AUD|-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
October 31, 2026
Retailer 14$225 AUD
Retailer 12$262 AUD
Retailer 13$279 AUD
Retailer 16$279 AUD
Retailer 6$308 AUD
Retailer 2$487 AUD
Retailer 10$505 AUD
Retailer 3$508 AUD
Retailer 5$726 AUD
Retailer 4$763 AUD
Retailer 8$893 AUD
Retailer 15$898 AUD
Retailer 11$950 AUD
Retailer 7$977 AUD
Retailer 9$1,314 AUD
Rare Carat$1,445 AUD

43 data points across 16 retailers

15 retailers$225 AUD to $1,445 AUD

A
Cheapest Retailer
-
$225 AUD
$158 USD
B+
Retailer 2
-
$262 AUD
$184 USD
View
B+
Retailer 3
-
$279 AUD
$196 USD
View
A
Retailer 4
-
$279 AUD
$196 USD
View
B+
Retailer 5
-
$487 AUD
£270 GBP
View
B+
Retailer 6
-
$505 AUD
£279 GBP
View
B
Retailer 7
-
$508 AUD
$357 USD
View
B+
Retailer 8
-
$726 AUD
$510 USD
View
B+
Retailer 9
-
$763 AUD
$536 USD
View
B
Retailer 10
-
$893 AUD
HK$4,900 HKD
View
B+
Retailer 11
-
$898 AUD
$631 USD
View
B
Retailer 12
-
$950 AUD
$667 USD
View
B
Retailer 13
-
$977 AUD
$686 USD
View
B
Retailer 14
-
$1,314 AUD
£727 GBP
View
Most Expensive
B
Rare Carat
497145476_l_497145476 · Oct 28
$1,445 AUD
$1,015 USD
View
14 more retailers have this diamond
Prices start from $225 AUDSave up to $1,220 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
1.57ct Radiant
$225 AUD