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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 €141 EUR
$158 USD
As of October 30, 2026
Save €767 EUR (84%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €909 EUR 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 €141 to €909, a €767 spread on the same certified stone. Rare Carat lists it at €909. 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

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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: €909 EUR|Low: €136 EUR|High: €1,038 EUR|Avg: €430 EUR|-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 14€141 EUR
Retailer 12€165 EUR
Retailer 13€175 EUR
Retailer 16€175 EUR
Retailer 6€194 EUR
Retailer 2€306 EUR
Retailer 10€318 EUR
Retailer 3€320 EUR
Retailer 5€456 EUR
Retailer 4€480 EUR
Retailer 8€561 EUR
Retailer 15€565 EUR
Retailer 11€597 EUR
Retailer 7€614 EUR
Retailer 9€826 EUR
Rare Carat€909 EUR

43 data points across 16 retailers

15 retailers€141 EUR to €909 EUR

A
Cheapest Retailer
-
€141 EUR
$158 USD
B+
Retailer 2
-
€165 EUR
$184 USD
View
Retailer 3
-
€175 EUR
$196 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
€175 EUR
$196 USD
View
B+
Retailer 5
-
€306 EUR
£270 GBP
View
B+
Retailer 6
-
€318 EUR
£279 GBP
View
B
Retailer 7
-
€320 EUR
$357 USD
View
B+
Retailer 8
-
€456 EUR
$510 USD
View
B+
Retailer 9
-
€480 EUR
$536 USD
View
B
Retailer 10
-
€561 EUR
HK$4,900 HKD
View
B+
Retailer 11
-
€565 EUR
$631 USD
View
B
Retailer 12
-
€597 EUR
$667 USD
View
B
Retailer 13
-
€614 EUR
$686 USD
View
B
Retailer 14
-
€826 EUR
£727 GBP
View
Most Expensive
B
Rare Carat
497145476_l_497145476 · Oct 28
€909 EUR
$1,015 USD
View
14 more retailers have this diamond
Prices start from €141 EURSave up to €767 EUR

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
€141 EUR