CaratHunter
Plans
Round|Lab Grown|IGI

1.66ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG12361906

Shape and cutting style on the report: Round brilliant

Certificate IGI LG12361906

Diamond specifications and retailer prices

From $615 CAD
$440 USD
As of November 1, 2026
Save $1,712 CAD (74%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $3,871 CAD at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

About this 1.66ct lab-grown round diamond

This 1.66ct lab-grown round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG12361906 or 12361906. Listed at 14 retailers as of November 1, 2026, with a 278% 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

1.66
Carat
G
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12361906
Dimensions7.59 × 7.56 × 4.73 mm
L/W Ratio1.00
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment. Type IIa
Top View
7.59 mm7.56 mm1.66 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG12361906
Side View
Table 59.0%Crown 35.5°Girdle: THN-UNDPavilion 41.4°Culet: NoneDepth 62.3%

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: Nov 1
Current: $3,871 CAD|Low: $381 CAD|High: $3,871 CAD|Avg: $1,405 CAD|+18.4%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 10$381 CAD
Retailer 11$422 CAD
Retailer 6$615 CAD
Retailer 7$878 CAD
Retailer 2$1,067 CAD
Retailer 9$1,220 CAD
Retailer 5$1,582 CAD
Retailer 3$1,948 CAD
Retailer 8$2,137 CAD
Retailer 4$2,327 CAD
Do Amore Diamonds$3,871 CAD

29 data points across 11 retailers

14 retailers$615 CAD to $2,327 CAD

Retailer 1
-
$340 CAD
$243 USD
Price last confirmed 41 days ago
Retailer 2
-
$394 CAD
$282 USD
View
Price last confirmed 41 days ago
Retailer 3
-
$416 CAD
$298 USD
View
Price last confirmed 41 days ago
A
Retailer 4
-
$615 CAD
$440 USD
View
B+
Retailer 5
-
$755 CAD
$540 USD
View
B+
Retailer 6
-
$878 CAD
$628 USD
View
B
Retailer 7
-
$1,067 CAD
£601 GBP
View
B
Retailer 8
-
$1,220 CAD
$873 USD
View
Retailer 9
-
$1,497 CAD
$1,071 USD
View
Price last confirmed 42 days ago
B
Retailer 10
-
$1,582 CAD
$1,132 USD
View
B
Retailer 11
-
$1,948 CAD
$1,394 USD
View
B
Retailer 12
-
$2,137 CAD
$1,529 USD
View
C
Retailer 13
-
$2,327 CAD
£1,311 GBP
View
Most Expensive
Do Amore Diamonds
27-08AD635EE · Nov 2
$3,871 CAD
$2,770 USD
View
Price under review
13 more retailers have this diamond
Prices start from $615 CADSave up to $1,712 CAD

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
1.66ct Round
$615 CAD