CaratHunter
Plans
Heart|Lab Grown|IGI

1.67ct E SI1 Heart Lab Grown Diamond

ID • E/SI1 • IGI LG642477401

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG642477401

Diamond specifications and retailer prices

From $345 AUD
$242 USD
As of October 30, 2026
Save $1,463 AUD (81%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $2,691 AUD at Brilliant Earth · As of October 12, 2026
View at Brilliant Earth

About this 1.67ct lab-grown heart diamond

This 1.67ct lab-grown heart sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG642477401 or 642477401. Listed at 16 retailers as of October 30, 2026, with a 425% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.67
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG642477401
Dimensions8.14 × 6.99 × 5.08 mm
L/W Ratio1.16
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.14 mm6.99 mm1.67 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG642477401
Side View
Table 60.0%Crown 35.4°Girdle: STK-THKPavilion 41.1°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $1,808 AUD|Low: $332 AUD|High: $2,762 AUD|Avg: $891 AUD|-34.5%
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
October 31, 2026
Retailer 15$345 AUD
Retailer 10$384 AUD
Retailer 13$400 AUD
Retailer 5$427 AUD
Retailer 6$427 AUD
Retailer 9$549 AUD
Retailer 14$577 AUD
Retailer 7$807 AUD
Retailer 2$811 AUD
Retailer 8$849 AUD
Retailer 4$900 AUD
Retailer 12$1,071 AUD
Retailer 3$1,375 AUD
Retailer 11$1,723 AUD
Brilliant Earth$1,808 AUD

30 data points across 15 retailers

16 retailers$345 AUD to $1,808 AUD

A
Cheapest Retailer
-
$345 AUD
$242 USD
A
Retailer 2
-
$384 AUD
$270 USD
View
Final sale: no returns
A
Retailer 3
-
$400 AUD
$281 USD
View
A
Retailer 4
-
$427 AUD
$300 USD
View
A
Retailer 5
-
$427 AUD
$300 USD
View
A
Retailer 6
-
$549 AUD
£304 GBP
View
B+
Retailer 7
-
$577 AUD
$405 USD
View
Retailer 8
-
$807 AUD
$567 USD
View
Price last confirmed 14 days ago
B+
Retailer 9
-
$811 AUD
£449 GBP
View
B+
Retailer 10
-
$849 AUD
View
B+
Retailer 11
-
$900 AUD
$632 USD
View
B+
Retailer 12
-
$1,071 AUD
$752 USD
View
B
Retailer 13
-
$1,375 AUD
$966 USD
View
Retailer 14
-
$1,723 AUD
£953 GBP
View
Price last confirmed 10 days ago
B
Retailer 15
-
$1,808 AUD
$1,270 USD
View
Most Expensive
Brilliant Earth
14017756A · Oct 12
$2,691 AUD
$1,890 USD
View
Price last confirmed 18 days ago
15 more retailers have this diamond
Prices start from $345 AUDSave up to $1,463 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
1.67ct Heart
$345 AUD