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Round|Lab Grown|IGI

1.66ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG480173846

Shape and cutting style on the report: Round brilliant

Certificate IGI LG480173846

Diamond specifications and retailer prices

From €838 EUR
$940 USD
As of November 2, 2026
Save €3,422 EUR (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €4,260 EUR at MOH London · As of November 1, 2026
View at MOH London

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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG480173846 or 480173846. Listed at 11 retailers as of November 1, 2026, with prices from €838 to €4,260, a €3,422 spread on the same certified stone. MOH London lists it at €4,260. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG480173846
Dimensions7.68 × 7.61 × 4.63 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
7.68 mm7.61 mm1.66 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG480173846
Side View
Table 60.5%Crown 32.9°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 60.5%

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: Nov 2
Current: €4,260 EUR|Low: €838 EUR|High: €4,316 EUR|Avg: €1,917 EUR
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 2€838 EUR
Retailer 3€1,143 EUR
Retailer 6€1,280 EUR
Retailer 4€1,326 EUR
Retailer 7€1,480 EUR
Retailer 10€1,545 EUR
Retailer 9€1,837 EUR
Retailer 5€2,100 EUR
Retailer 8€2,471 EUR
MOH London€4,260 EUR

15 data points across 10 retailers

11 retailers€838 EUR to €4,260 EUR

A
Cheapest Retailer
-
€838 EUR
$940 USD
B+
Retailer 2
-
€1,143 EUR
$1,282 USD
View
B+
Retailer 3
-
€1,244 EUR
$1,395 USD
View
B+
Retailer 4
-
€1,280 EUR
$1,436 USD
View
Final sale: no returns
B+
Retailer 5
-
€1,326 EUR
$1,487 USD
View
Retailer 6
-
€1,326 EUR
$1,487 USD
View
Price last confirmed 21 days ago
B+
Retailer 7
-
€1,480 EUR
$1,660 USD
View
B
Retailer 8
-
€2,100 EUR
$2,355 USD
View
B
Retailer 9
-
€2,471 EUR
$2,772 USD
View
B
Retailer 10
-
€2,485 EUR
$2,787 USD
View
Most Expensive
B
MOH London
LG480173846 · Nov 1
€4,260 EUR
£3,762 GBP
View
10 more retailers have this diamond
Prices start from €838 EURSave up to €3,422 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
€838 EUR