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Heart|Lab Grown|IGI

1.91ct D FL Heart Lab Grown Diamond

EX • D/FL • IGI LG831604009

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG831604009

Diamond specifications and retailer prices

From $1,391 AUD
$975 USD
As of November 2, 2026
Save $5,287 AUD (79%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $6,678 AUD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.91ct lab-grown heart diamond

This 1.91ct lab-grown heart sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG831604009 or 831604009. Listed at 21 retailers as of November 2, 2026, with prices from $1,391 to $6,678, a $5,287 spread on the same certified stone. Brilliant Earth lists it at $6,678. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.91
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831604009
Dimensions7.60 × 8.63 × 5.02 mm
L/W Ratio1.14
Girdle conditionFaceted
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
7.60 mm8.63 mm1.91 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831604009
Side View
Table 58.0%Crown 34°Girdle: MED-STKPavilion 40°Culet: NoneDepth 58.2%

Caratlytics Score

How it works →
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 2
Current: $6,678 AUD|Low: $1,391 AUD|High: $8,804 AUD|Avg: $4,265 AUD|-24.0%
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
Retailer 18
Retailer 19
Retailer 20
November 2, 2026
Retailer 2$1,391 AUD
Retailer 6$1,558 AUD
Retailer 18$1,614 AUD
Retailer 13$1,824 AUD
Retailer 9$1,863 AUD
Retailer 20$1,931 AUD
Retailer 3$2,205 AUD
Retailer 16$2,340 AUD
Retailer 14$2,489 AUD
Retailer 5$2,530 AUD
Retailer 19$3,025 AUD
Retailer 12$3,669 AUD
Retailer 11$3,944 AUD
Retailer 4$4,800 AUD
Retailer 17$5,232 AUD
Retailer 7$5,410 AUD
Retailer 15$5,475 AUD
Retailer 10$5,622 AUD
Retailer 8$5,819 AUD
Brilliant Earth$6,678 AUD

30 data points across 20 retailers

21 retailers$1,391 AUD to $6,678 AUD

A
Cheapest Retailer
-
$1,391 AUD
$975 USD
A
Retailer 2
-
$1,558 AUD
$1,092 USD
View
Final sale: no returns
A
Retailer 3
-
$1,614 AUD
$1,131 USD
View
A
Retailer 4
-
$1,824 AUD
£1,007 GBP
View
A
Retailer 5
-
$1,863 AUD
HK$10,200 HKD
View
A
Retailer 6
-
$1,931 AUD
$1,353 USD
View
Retailer 7
-
$2,146 AUD
$1,504 USD
View
Price last confirmed 20 days ago
B+
Retailer 8
-
$2,205 AUD
$1,545 USD
View
B+
Retailer 9
-
$2,340 AUD
$1,640 USD
View
B+
Retailer 10
-
$2,489 AUD
£1,374 GBP
View
B+
Retailer 11
-
$2,530 AUD
$1,773 USD
View
B+
Retailer 12
-
$3,025 AUD
$2,120 USD
View
B
Retailer 13
-
$3,669 AUD
$2,571 USD
View
B+
Retailer 14
-
$3,944 AUD
ZAR 44,652 ZAR
View
B
Retailer 15
-
$4,800 AUD
$3,364 USD
View
B
Retailer 16
-
$5,232 AUD
$3,667 USD
View
B
Retailer 17
-
$5,410 AUD
SGD 5,124 SGD
View
B
Retailer 18
-
$5,475 AUD
£3,021 GBP
View
B
Retailer 19
-
$5,622 AUD
$3,940 USD
View
B
Retailer 20
-
$5,819 AUD
$4,078 USD
View
Most Expensive
B
Brilliant Earth
21605244A · Nov 2
$6,678 AUD
$4,680 USD
View
20 more retailers have this diamond
Prices start from $1,391 AUDSave up to $5,287 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
1.91ct Heart
$1,391 AUD