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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 $242 USD
As of October 27, 2026
Save $1,648 USD (87%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,890 USD 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 27, 2026, with a 681% 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: $1,890 USD|Low: $233 USD|High: $1,940 USD|Avg: $620 USD|-2.6%
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
October 30, 2026
Retailer 16$242 USD
Retailer 10$270 USD
Retailer 14$281 USD
Retailer 5$300 USD
Retailer 6$300 USD
Retailer 2$386 USD
Retailer 15$405 USD
Retailer 8$491 USD
Retailer 7$567 USD
Retailer 9$570 USD
Retailer 11$597 USD
Retailer 4$632 USD
Retailer 13$752 USD
Retailer 3$966 USD
Retailer 12$1,210 USD
Brilliant Earth$1,890 USD

29 data points across 16 retailers

16 retailers$242 USD to $1,890 USD

A
Cheapest Retailer
-
$242 USD
A
Retailer 2
-
$270 USD
View
Final sale: no returns
A
Retailer 3
-
$281 USD
View
A
Retailer 4
-
$300 USD
View
A
Retailer 5
-
$300 USD
View
A
Retailer 6
-
$386 USD
£304 GBP
View
B+
Retailer 7
-
$405 USD
View
Retailer 8
-
$567 USD
View
Price last confirmed 12 days ago
B+
Retailer 9
-
$570 USD
£449 GBP
View
B+
Retailer 10
-
$597 USD
A$918 AUD
View
B+
Retailer 11
-
$632 USD
View
B+
Retailer 12
-
$752 USD
View
B
Retailer 13
-
$966 USD
View
Retailer 14
-
$1,210 USD
£953 GBP
View
Price last confirmed 9 days ago
B
Retailer 15
-
$1,890 USD
View
Most Expensive
Brilliant Earth
14017756A · Oct 12
$1,890 USD
View
Price last confirmed 17 days ago
15 more retailers have this diamond
Prices start from $242 USDSave up to $1,648 USD

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
$242 USD