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Heart|Lab Grown|IGI

1.57ct E SI1 Heart Lab Grown Diamond

ID • E/SI1 • IGI LG528207699

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG528207699

Diamond specifications and retailer prices

From $428 NZD
$241 USD
As of October 30, 2026
Save $1,924 NZD (82%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $2,352 NZD at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 1.57ct lab-grown heart diamond

This 1.57ct lab-grown heart sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG528207699 or 528207699. Listed at 16 retailers as of October 30, 2026, with prices from $428 to $2,352, a $1,924 spread on the same certified stone. Reve Diamonds lists it at $2,352. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.57
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle38.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG528207699
Dimensions8.11 × 6.90 × 4.63 mm
L/W Ratio1.18
Girdle conditionFaceted
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
8.11 mm6.90 mm1.57 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG528207699
Side View
Table 58.5%Crown 35°Girdle: THK-VTKPavilion 38.4°Culet: NoneDepth 57.1%

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: $1,059 NZD|Low: $412 NZD|High: $2,352 NZD|Avg: $1,068 NZD|+2.2%
Retailer 1
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
Reve Diamonds
October 31, 2026
Retailer 13$428 NZD
Retailer 7$479 NZD
Retailer 16$497 NZD
Retailer 3$531 NZD
Retailer 14$531 NZD
Retailer 9$682 NZD
Retailer 2$713 NZD
Retailer 8$833 NZD
Retailer 6$885 NZD
Retailer 4$979 NZD
Retailer 10$1,006 NZD
Retailer 1$1,059 NZD
Retailer 15$1,707 NZD
Retailer 12$1,712 NZD
Retailer 5$1,799 NZD
Retailer 11$2,129 NZD
Reve Diamonds$2,352 NZD

40 data points across 17 retailers

16 retailers$428 NZD to $2,352 NZD

A
Cheapest Retailer
-
$428 NZD
$241 USD
A
Retailer 2
-
$479 NZD
$270 USD
View
Final sale: no returns
A
Retailer 3
-
$497 NZD
$280 USD
View
A
Retailer 4
-
$531 NZD
$299 USD
View
A
Retailer 5
-
$531 NZD
$299 USD
View
A
Retailer 6
-
$682 NZD
£303 GBP
View
B+
Retailer 7
-
$713 NZD
$402 USD
View
B+
Retailer 8
-
$885 NZD
$499 USD
View
B+
Retailer 9
-
$979 NZD
$552 USD
View
B+
Retailer 10
-
$1,006 NZD
£447 GBP
View
B+
Retailer 11
-
$1,059 NZD
A$918 AUD
View
B
Retailer 12
-
$1,707 NZD
$962 USD
View
B
Retailer 13
-
$1,712 NZD
$965 USD
View
B
Retailer 14
-
$1,799 NZD
$1,014 USD
View
B
Retailer 15
-
$2,129 NZD
£945 GBP
View
Most Expensive
B
Reve Diamonds
F23C86C3D · Oct 30
$2,352 NZD
$1,326 USD
View
15 more retailers have this diamond
Prices start from $428 NZDSave up to $1,924 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 Heart
$428 NZD