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Heart|Lab Grown|IGI

3.99ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG846663142

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG846663142

Diamond specifications and retailer prices

From $6,741 AUD
$4,735 USD
As of October 31, 2026
Save $20,493 AUD (75%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $27,233 AUD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.99ct lab-grown heart diamond

This 3.99ct lab-grown heart sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG846663142 or 846663142. Listed at 9 retailers as of October 29, 2026, with prices from $6,741 to $27,233, a $20,493 spread on the same certified stone. Brilliant Earth lists it at $27,233. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.99
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.9°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846663142
Dimensions9.88 × 10.61 × 6.39 mm
L/W Ratio1.07
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
9.88 mm10.61 mm3.99 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846663142
Side View
Table 59.0%Crown 36.9°Girdle: THK-VTKPavilion 39.7°Culet: NoneDepth 60.2%

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: Oct 31
Current: $7,955 AUD|Low: $6,741 AUD|High: $14,353 AUD|Avg: $10,406 AUD|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 7$6,741 AUD
Retailer 1$7,955 AUD
Retailer 6$8,255 AUD
Retailer 5$8,841 AUD
Retailer 4$10,323 AUD
Retailer 2$13,005 AUD
Retailer 8$14,084 AUD
Retailer 3$14,353 AUD

6 data points across 8 retailers

9 retailers$6,741 AUD to $27,233 AUD

A
Cheapest Retailer
-
$6,741 AUD
$4,735 USD
B+
Retailer 2
-
$7,955 AUD
£4,400 GBP
View
B+
Retailer 3
-
$8,255 AUD
$5,799 USD
View
B+
Retailer 4
-
$8,841 AUD
$6,210 USD
View
B+
Retailer 5
-
$10,323 AUD
$7,251 USD
View
B+
Retailer 6
-
$13,005 AUD
€8,700 EUR
View
B+
Retailer 7
-
$14,084 AUD
$9,893 USD
View
B
Retailer 8
-
$14,353 AUD
£7,939 GBP
View
Most Expensive
B
Brilliant Earth
22305682A · Oct 29
$27,233 AUD
$19,130 USD
View
8 more retailers have this diamond
Prices start from $6,741 AUDSave up to $20,493 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
3.99ct Heart
$6,741 AUD