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Radiant|Lab Grown|IGI

1.57ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG665445078

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG665445078

Diamond specifications and retailer prices

From $513 NZD
$289 USD
As of October 30, 2026
Save $5,165 NZD (91%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: $5,678 NZD at Diamond Quarter · As of October 31, 2026
View at Diamond Quarter

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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG665445078 or 665445078. Listed at 26 retailers as of October 30, 2026, with prices from $513 to $5,678, a $5,165 spread on the same certified stone. Diamond Quarter lists it at $5,678. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.57
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.1°
Pavilion angle33.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG665445078
Dimensions8.55 × 5.71 × 3.73 mm
L/W Ratio1.50
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
8.55 mm5.71 mm1.57 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG665445078
Side View
Table 62.0%Crown 44.1°Girdle: MediumPavilion 33.3°Culet: NoneDepth 65.3%

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: $1,251 NZD|Low: $491 NZD|High: $6,015 NZD|Avg: $2,025 NZD|-3.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
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Retailer 9
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Retailer 11
Retailer 12
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Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
Retailer 23
Retailer 24
Retailer 25
November 1, 2026
Retailer 3$513 NZD
Retailer 24$594 NZD
Retailer 5$610 NZD
Retailer 2$635 NZD
Retailer 7$905 NZD
Retailer 16$931 NZD
Retailer 8$990 NZD
Retailer 14$1,102 NZD
Retailer 12$1,140 NZD
Retailer 23$1,205 NZD
Retailer 1$1,251 NZD
Retailer 9$1,499 NZD
Retailer 15$1,581 NZD
Retailer 22$1,634 NZD
Retailer 6$1,952 NZD
Retailer 4$2,255 NZD
Retailer 11$2,443 NZD
Retailer 17$2,542 NZD
Retailer 10$2,614 NZD
Retailer 18$2,714 NZD
Retailer 21$2,826 NZD
Retailer 19$2,981 NZD
Retailer 13$4,542 NZD
Retailer 25$4,560 NZD
Retailer 20$5,216 NZD

34 data points across 25 retailers

26 retailers$513 NZD to $5,678 NZD

A
Cheapest Retailer
-
$513 NZD
$289 USD
A
Retailer 2
-
$594 NZD
$335 USD
View
A
Retailer 3
-
$610 NZD
$344 USD
View
Final sale: no returns
A
Retailer 4
-
$635 NZD
$358 USD
View
A
Retailer 5
-
$905 NZD
$510 USD
View
A
Retailer 6
-
$931 NZD
HK$4,100 HKD
View
A
Retailer 7
-
$990 NZD
$558 USD
View
A
Retailer 8
-
$1,102 NZD
$621 USD
View
A
Retailer 9
-
$1,140 NZD
€612 EUR
View
A
Retailer 10
-
$1,205 NZD
ZAR 10,972 ZAR
View
A
Retailer 11
-
$1,251 NZD
£555 GBP
View
A
Retailer 12
-
$1,499 NZD
$845 USD
View
A
Retailer 13
-
$1,581 NZD
$891 USD
View
A
Retailer 14
-
$1,634 NZD
A$1,417 AUD
View
B+
Retailer 15
-
$1,952 NZD
$1,100 USD
View
B+
Retailer 16
-
$2,255 NZD
$1,271 USD
View
B+
Retailer 17
-
$2,443 NZD
$1,377 USD
View
B+
Retailer 18
-
$2,542 NZD
$1,433 USD
View
B+
Retailer 19
-
$2,614 NZD
$1,473 USD
View
B+
Retailer 20
-
$2,714 NZD
SGD 2,067 SGD
View
B+
Retailer 21
-
$2,826 NZD
£1,254 GBP
View
B+
Retailer 22
-
$2,981 NZD
A$2,585 AUD
View
B
Retailer 23
-
$4,542 NZD
$2,560 USD
View
B
Retailer 24
-
$4,560 NZD
$2,570 USD
View
B
Retailer 25
-
$5,216 NZD
$2,940 USD
View
Most Expensive
B
Diamond Quarter
1.57IFDLG784962N · Oct 31
$5,678 NZD
£2,520 GBP
View
25 more retailers have this diamond
Prices start from $513 NZDSave up to $5,165 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
1.57ct Radiant
$513 NZD