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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 $1,595 NZD
$899 USD
As of November 1, 2026
Save $7,330 NZD (82%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $8,925 NZD at Brilliant Earth · As of October 31, 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 October 31, 2026, with prices from $1,595 to $8,925, a $7,330 spread on the same certified stone. Brilliant Earth lists it at $8,925. 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: $8,925 NZD|Low: $1,595 NZD|High: $14,886 NZD|Avg: $6,785 NZD|-40.0%
Brilliant Earth
Retailer 2
Retailer 3
November 2, 2026
Retailer 3$1,595 NZD
Retailer 2$2,613 NZD
Brilliant Earth$8,925 NZD

11 data points across 3 retailers

3 retailers$1,595 NZD to $8,925 NZD

A
Cheapest Retailer
-
$1,595 NZD
$899 USD
Final sale: no returns
A
Retailer 2
-
$2,613 NZD
£1,160 GBP
View
Most Expensive
B
Brilliant Earth
22227122A · Oct 31
$8,925 NZD
$5,030 USD
View
2 more retailers have this diamond
Prices start from $1,595 NZDSave up to $7,330 NZD

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
$1,595 NZD