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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 $345 AUD
As of November 4, 2026
Save $1,503 AUD (81%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,848 AUD 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 $345 to $1,848, a $1,503 spread on the same certified stone. Brilliant Earth lists it at $1,848. 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: $1,848 AUD|Low: $332 AUD|High: $4,432 AUD|Avg: $1,120 AUD|-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$345 AUD
Retailer 17$399 AUD
Retailer 10$400 AUD
Retailer 14$428 AUD
Retailer 4$502 AUD
Retailer 3$604 AUD
Retailer 6$760 AUD
Retailer 5$795 AUD
Retailer 11$800 AUD
Retailer 8$936 AUD
Retailer 9$1,201 AUD
Retailer 2$1,375 AUD
Retailer 16$1,380 AUD
Retailer 7$1,447 AUD
Retailer 13$1,559 AUD
Retailer 12$1,714 AUD
Brilliant Earth$1,848 AUD

45 data points across 17 retailers

16 retailers$345 AUD to $1,848 AUD

A
Cheapest Retailer
-
$345 AUD
A
Retailer 2
-
$399 AUD
View
Final sale: no returns
A
Retailer 3
-
$400 AUD
View
A
Retailer 4
-
$428 AUD
View
A
Retailer 5
-
$502 AUD
View
B+
Retailer 6
-
$604 AUD
View
B+
Retailer 7
-
$760 AUD
View
B+
Retailer 8
-
$795 AUD
View
B+
Retailer 9
-
$800 AUD
View
B+
Retailer 10
-
$936 AUD
View
B
Retailer 11
-
$1,375 AUD
View
B
Retailer 12
-
$1,380 AUD
View
B
Retailer 13
-
$1,447 AUD
View
B
Retailer 14
-
$1,559 AUD
View
B
Retailer 15
-
$1,714 AUD
View
Most Expensive
B
Brilliant Earth
8062596A · Nov 6
$1,848 AUD
$1,270 USD
View
15 more retailers have this diamond
Prices start from $345 AUDSave up to $1,503 AUD

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
$345 AUD