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Radiant|Lab Grown|IGI

1.57ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG700512156

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

Certificate IGI LG700512156

Diamond specifications and retailer prices

From $589 NZD
$332 USD
As of October 30, 2026
Save $3,980 NZD (87%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $4,569 NZD 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG700512156 or 700512156. Listed at 24 retailers as of October 28, 2026, with prices from $589 to $4,569, a $3,980 spread on the same certified stone. Rare Carat lists it at $4,569. 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 angle39.2°
Pavilion angle33°
OriginLab Grown
Grading LabIGI
CertificateIGI LG700512156
Dimensions8.59 × 5.74 × 3.70 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
8.59 mm5.74 mm1.57 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG700512156
Side View
Table 63.0%Crown 39.2°Girdle: MediumPavilion 33°Culet: NoneDepth 64.5%

Caratlytics Score

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A+
Exceptional
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: $4,569 NZD|Low: $566 NZD|High: $4,587 NZD|Avg: $1,834 NZD|-0.4%
Rare Carat
Retailer 2
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Retailer 24
November 1, 2026
Retailer 3$589 NZD
Retailer 23$683 NZD
Retailer 22$703 NZD
Retailer 24$731 NZD
Retailer 14$840 NZD
Retailer 19$923 NZD
Retailer 7$1,029 NZD
Retailer 18$1,187 NZD
Retailer 11$1,191 NZD
Retailer 21$1,255 NZD
Retailer 13$1,308 NZD
Retailer 12$1,655 NZD
Retailer 20$1,703 NZD
Retailer 8$1,938 NZD
Retailer 5$2,143 NZD
Retailer 4$2,349 NZD
Retailer 15$2,427 NZD
Retailer 17$2,443 NZD
Retailer 16$2,445 NZD
Retailer 10$2,761 NZD
Retailer 9$2,866 NZD
Retailer 2$2,927 NZD
Retailer 6$3,032 NZD
Rare Carat$4,569 NZD

32 data points across 24 retailers

24 retailers$589 NZD to $4,569 NZD

A+
Cheapest Retailer
-
$589 NZD
$332 USD
A
Retailer 2
-
$683 NZD
$385 USD
View
A
Retailer 3
-
$703 NZD
$396 USD
View
Final sale: no returns
A
Retailer 4
-
$731 NZD
$412 USD
View
A
Retailer 5
-
$840 NZD
HK$3,700 HKD
View
A
Retailer 6
-
$923 NZD
$520 USD
View
A
Retailer 7
-
$1,029 NZD
$580 USD
View
A
Retailer 8
-
$1,187 NZD
€637 EUR
View
A
Retailer 9
-
$1,191 NZD
$671 USD
View
A
Retailer 10
-
$1,255 NZD
ZAR 11,431 ZAR
View
A
Retailer 11
-
$1,308 NZD
£581 GBP
View
A
Retailer 12
-
$1,655 NZD
$933 USD
View
A
Retailer 13
-
$1,703 NZD
A$1,477 AUD
View
A
Retailer 14
-
$1,938 NZD
$1,092 USD
View
B+
Retailer 15
-
$2,143 NZD
$1,208 USD
View
B+
Retailer 16
-
$2,349 NZD
$1,324 USD
View
B+
Retailer 17
-
$2,427 NZD
$1,368 USD
View
B+
Retailer 18
-
$2,443 NZD
$1,377 USD
View
B+
Retailer 19
-
$2,445 NZD
SGD 1,862 SGD
View
B+
Retailer 20
-
$2,761 NZD
$1,556 USD
View
B+
Retailer 21
-
$2,866 NZD
$1,615 USD
View
B+
Retailer 22
-
$2,927 NZD
£1,299 GBP
View
Retailer 23
-
$3,032 NZD
A$2,629 AUD
View
Price last confirmed 24 days ago
Most Expensive
B
Rare Carat
2186-12-614 · Oct 28
$4,569 NZD
$2,575 USD
View
23 more retailers have this diamond
Prices start from $589 NZDSave up to $3,980 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
$589 NZD