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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 $237 USD
As of October 30, 2026
Save $1,033 USD (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,270 USD at Brilliant Earth · As of October 31, 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 15 retailers as of October 30, 2026, with prices from $237 to $1,270, a $1,033 spread on the same certified stone. Brilliant Earth lists it at $1,270. 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
Color
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: Oct 30
Current: $1,270 USD|Low: $228 USD|High: $3,045 USD|Avg: $811 USD|-32.1%
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 1, 2026
Retailer 14$237 USD
Retailer 17$274 USD
Retailer 12$275 USD
Retailer 13$294 USD
Retailer 4$346 USD
Retailer 3$415 USD
Retailer 6$522 USD
Retailer 5$546 USD
Retailer 10$556 USD
Retailer 8$644 USD
Retailer 9$825 USD
Retailer 15$945 USD
Retailer 16$948 USD
Retailer 7$995 USD
Retailer 11$1,071 USD
Retailer 2$1,179 USD
Brilliant Earth$1,270 USD

41 data points across 17 retailers

15 retailers$237 USD to $1,270 USD

A
Cheapest Retailer
-
$237 USD
A
Retailer 2
-
$275 USD
View
A
Retailer 3
-
$294 USD
View
A
Retailer 4
-
$346 USD
HK$2,700 HKD
View
B+
Retailer 5
-
$415 USD
View
B+
Retailer 6
-
$522 USD
View
B+
Retailer 7
-
$546 USD
View
B+
Retailer 8
-
$556 USD
£438 GBP
View
B+
Retailer 9
-
$644 USD
View
B
Retailer 10
-
$945 USD
View
B
Retailer 11
-
$948 USD
View
B
Retailer 12
-
$995 USD
SGD 1,344 SGD
View
B
Retailer 13
-
$1,071 USD
A$1,648 AUD
View
B
Retailer 14
-
$1,179 USD
£928 GBP
View
Most Expensive
B
Brilliant Earth
8062596A · Oct 31
$1,270 USD
View
14 more retailers have this diamond
Prices start from $237 USDSave up to $1,033 USD

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
$237 USD