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Round|Lab Grown|IGI

1.66ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG589308920

Shape and cutting style on the report: Round brilliant

Certificate IGI LG589308920

Diamond specifications and retailer prices

From $277 CAD
$198 USD
As of October 29, 2026
Save $2,672 CAD (91%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,949 CAD at Jared · As of October 28, 2026
View at Jared

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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG589308920 or 589308920. Listed at 11 retailers as of October 28, 2026, with prices from $277 to $2,949, a $2,672 spread on the same certified stone. Jared lists it at $2,949. 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
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG589308920
Dimensions7.61 × 7.65 × 4.68 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.61 mm7.65 mm1.66 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG589308920
Side View
Table 56.0%Crown 34.2°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.3%

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 29
Current: $699 CAD|Low: $229 CAD|High: $2,711 CAD|Avg: $1,023 CAD|-1.7%
Retailer 1
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 29, 2026
Retailer 14$277 CAD
Retailer 15$313 CAD
Retailer 13$321 CAD
Retailer 12$595 CAD
Retailer 1$699 CAD
Retailer 5$760 CAD
Retailer 4$841 CAD
Retailer 3$850 CAD
Retailer 6$865 CAD
Retailer 7$873 CAD
Retailer 9$1,107 CAD
Retailer 10$1,217 CAD
Retailer 8$1,519 CAD
Retailer 2$1,873 CAD
Retailer 11$2,655 CAD

32 data points across 15 retailers

11 retailers$277 CAD to $2,949 CAD

A
Cheapest Retailer
-
$277 CAD
$198 USD
A
Retailer 2
-
$313 CAD
$224 USD
View
Final sale: no returns
A
Retailer 3
-
$321 CAD
$230 USD
View
B+
Retailer 4
-
$595 CAD
$426 USD
View
A
Retailer 5
-
$699 CAD
£394 GBP
View
B+
Retailer 6
-
$1,107 CAD
$792 USD
View
B+
Retailer 7
-
$1,217 CAD
$871 USD
View
B
Retailer 8
-
$1,519 CAD
£856 GBP
View
Price last confirmed 7 days ago
B
Retailer 9
-
$1,873 CAD
$1,340 USD
View
B
Retailer 10
-
$2,655 CAD
$1,900 USD
View
Most Expensive
B
Jared
150062110 · Oct 28
$2,949 CAD
$2,110 USD
View
10 more retailers have this diamond
Prices start from $277 CADSave up to $2,672 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
$277 CAD