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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 €177 EUR
$198 USD
As of October 29, 2026
Save €1,705 EUR (91%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €1,881 EUR 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 €177 to €1,881, a €1,705 spread on the same certified stone. Jared lists it at €1,881. 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

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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: €446 EUR|Low: €146 EUR|High: €1,730 EUR|Avg: €653 EUR|-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€177 EUR
Retailer 15€200 EUR
Retailer 13€205 EUR
Retailer 12€380 EUR
Retailer 1€446 EUR
Retailer 5€485 EUR
Retailer 4€537 EUR
Retailer 3€542 EUR
Retailer 6€552 EUR
Retailer 7€557 EUR
Retailer 9€706 EUR
Retailer 10€777 EUR
Retailer 8€969 EUR
Retailer 2€1,195 EUR
Retailer 11€1,694 EUR

32 data points across 15 retailers

11 retailers€177 EUR to €1,881 EUR

A
Cheapest Retailer
-
€177 EUR
$198 USD
A
Retailer 2
-
€200 EUR
$224 USD
View
Final sale: no returns
A
Retailer 3
-
€205 EUR
$230 USD
View
B+
Retailer 4
-
€380 EUR
$426 USD
View
A
Retailer 5
-
€446 EUR
£394 GBP
View
B+
Retailer 6
-
€706 EUR
$792 USD
View
B+
Retailer 7
-
€777 EUR
$871 USD
View
B
Retailer 8
-
€969 EUR
£856 GBP
View
Price last confirmed 7 days ago
B
Retailer 9
-
€1,195 EUR
$1,340 USD
View
B
Retailer 10
-
€1,694 EUR
$1,900 USD
View
Most Expensive
B
Jared
150062110 · Oct 28
€1,881 EUR
$2,110 USD
View
10 more retailers have this diamond
Prices start from €177 EURSave up to €1,705 EUR

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
€177 EUR