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Heart|Lab Grown|IGI

6.45ct G SI1 Heart Lab Grown Diamond

EX • G/SI1 • IGI LG848603957

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG848603957

Diamond specifications and retailer prices

From $1,283 AUD
$899 USD
As of November 1, 2026
Save $5,895 AUD (82%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $7,177 AUD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 6.45ct lab-grown heart diamond

This 6.45ct lab-grown heart sits in the over five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG848603957 or 848603957. Listed at 3 retailers as of November 1, 2026, with prices from $1,283 to $7,177, a $5,895 spread on the same certified stone. Brilliant Earth lists it at $7,177. 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

6.45
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG848603957
Dimensions11.14 × 13.07 × 7.58 mm
L/W Ratio1.17
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.14 mm13.07 mm6.45 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG848603957
Side View
Table 61.0%Crown 35.9°Girdle: MED-STKPavilion 39.2°Culet: NoneDepth 58.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: $7,177 AUD|Low: $1,283 AUD|High: $11,972 AUD|Avg: $5,457 AUD|-40.0%
Brilliant Earth
Retailer 2
Retailer 3
November 2, 2026
Retailer 3$1,283 AUD
Retailer 2$2,102 AUD
Brilliant Earth$7,177 AUD

11 data points across 3 retailers

3 retailers$1,283 AUD to $7,177 AUD

A
Cheapest Retailer
-
$1,283 AUD
$899 USD
Final sale: no returns
A
Retailer 2
-
$2,102 AUD
£1,160 GBP
View
Most Expensive
B
Brilliant Earth
22227122A · Nov 2
$7,177 AUD
$5,030 USD
View
2 more retailers have this diamond
Prices start from $1,283 AUDSave up to $5,895 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
6.45ct Heart
$1,283 AUD