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Heart|Lab Grown|IGI

1.54ct D SI1 Heart Lab Grown Diamond

ID • D/SI1 • IGI LG598311827

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG598311827

Diamond specifications and retailer prices

From $428 NZD
As of November 4, 2026
Save $1,863 NZD (81%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $2,291 NZD at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.54ct lab-grown heart diamond

This 1.54ct lab-grown heart sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG598311827 or 598311827. Listed at 16 retailers as of November 4, 2026, with prices from $428 to $2,291, a $1,863 spread on the same certified stone. Brilliant Earth lists it at $2,291. 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

1.54
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.8°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG598311827
Dimensions8.00 × 6.85 × 4.75 mm
L/W Ratio1.17
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
8.00 mm6.85 mm1.54 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG598311827
Side View
Table 60.0%Crown 36.8°Girdle: MED-THKPavilion 39.1°Culet: NoneDepth 59.4%

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: Nov 4
Current: $2,291 NZD|Low: $411 NZD|High: $5,493 NZD|Avg: $1,389 NZD|-3.1%
Brilliant Earth
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
Retailer 17
November 6, 2026
Retailer 15$428 NZD
Retailer 17$494 NZD
Retailer 10$496 NZD
Retailer 14$530 NZD
Retailer 4$622 NZD
Retailer 3$749 NZD
Retailer 6$942 NZD
Retailer 5$985 NZD
Retailer 11$992 NZD
Retailer 8$1,160 NZD
Retailer 9$1,488 NZD
Retailer 2$1,705 NZD
Retailer 16$1,710 NZD
Retailer 7$1,793 NZD
Retailer 13$1,932 NZD
Retailer 12$2,125 NZD
Brilliant Earth$2,291 NZD

45 data points across 17 retailers

16 retailers$428 NZD to $2,291 NZD

A
Cheapest Retailer
-
$428 NZD
A
Retailer 2
-
$494 NZD
View
Final sale: no returns
A
Retailer 3
-
$496 NZD
View
A
Retailer 4
-
$530 NZD
View
A
Retailer 5
-
$622 NZD
View
B+
Retailer 6
-
$749 NZD
View
B+
Retailer 7
-
$942 NZD
View
B+
Retailer 8
-
$985 NZD
View
B+
Retailer 9
-
$992 NZD
View
B+
Retailer 10
-
$1,160 NZD
View
B
Retailer 11
-
$1,705 NZD
View
B
Retailer 12
-
$1,710 NZD
View
B
Retailer 13
-
$1,793 NZD
View
B
Retailer 14
-
$1,932 NZD
View
B
Retailer 15
-
$2,125 NZD
View
Most Expensive
B
Brilliant Earth
8062596A · Nov 6
$2,291 NZD
$1,270 USD
View
15 more retailers have this diamond
Prices start from $428 NZDSave up to $1,863 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
1.54ct Heart
$428 NZD