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Round|Lab Grown|IGI

1.66ct K SI1 Round Lab Grown Diamond

EX • K/SI1 • IGI LG407948757

Shape and cutting style on the report: Round brilliant

Certificate IGI LG407948757

Diamond specifications and retailer prices

From €923 EUR
As of November 5, 2026
Save €2,707 EUR (75%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €3,631 EUR at MOH London · As of November 3, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG407948757 or 407948757. Listed at 9 retailers as of November 3, 2026, with prices from €923 to €3,631, a €2,707 spread on the same certified stone. MOH London lists it at €3,631. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.1°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG407948757
Dimensions7.67 × 7.72 × 4.55 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD) Type IIa
Top View
7.67 mm7.72 mm1.66 ctK / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG407948757
Side View
Table 59.0%Crown 32.1°GirdlePavilion 40.3°Culet: NoneDepth 59.2%

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 5
Current: €3,631 EUR|Low: €923 EUR|High: €3,680 EUR|Avg: €2,032 EUR
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 3, 2026
Retailer 3€923 EUR
Retailer 4€1,070 EUR
Retailer 2€1,227 EUR
Retailer 7€1,557 EUR
Retailer 5€1,707 EUR
Retailer 6€2,237 EUR
Retailer 8€3,064 EUR
MOH London€3,631 EUR

15 data points across 8 retailers

9 retailers€923 EUR to €3,631 EUR

A
Cheapest Retailer
-
€923 EUR
B+
Retailer 2
-
€1,004 EUR
View
Retailer 3
-
€1,070 EUR
View
Price last confirmed 25 days ago
B+
Retailer 4
-
€1,070 EUR
View
B+
Retailer 5
-
€1,227 EUR
View
B
Retailer 6
-
€1,707 EUR
View
B
Retailer 7
-
€2,007 EUR
View
B
Retailer 8
-
€2,237 EUR
View
Most Expensive
B
MOH London
LG407948757 · Nov 3
€3,631 EUR
£3,192 GBP
View
8 more retailers have this diamond
Prices start from €923 EURSave up to €2,707 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
€923 EUR