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Round|Lab Grown|IGI

1.66ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG817605189

Shape and cutting style on the report: Round brilliant

Certificate IGI LG817605189

Diamond specifications and retailer prices

From €164 EUR
$183 USD
As of November 1, 2026
Save €788 EUR (83%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €951 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG817605189 or 817605189. Listed at 10 retailers as of November 1, 2026, with prices from €164 to €951, a €788 spread on the same certified stone. MOH London lists it at €951. 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
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817605189
Dimensions7.57 × 7.62 × 4.65 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.57 mm7.62 mm1.66 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817605189
Side View
Table 62.0%Crown 33.9°Girdle: MED-STKPavilion 41.5°Culet: NoneDepth 61.2%

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: Nov 1
Current: €951 EUR|Low: €159 EUR|High: €1,602 EUR|Avg: €627 EUR|-2.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 4€164 EUR
Retailer 7€191 EUR
Retailer 2€317 EUR
Retailer 5€349 EUR
Retailer 9€508 EUR
Retailer 8€654 EUR
Retailer 6€691 EUR
Retailer 10€838 EUR
Retailer 3€949 EUR
MOH London€951 EUR

29 data points across 10 retailers

10 retailers€164 EUR to €951 EUR

A
Cheapest Retailer
-
€164 EUR
$183 USD
A
Retailer 2
-
€191 EUR
$213 USD
View
A
Retailer 3
-
€317 EUR
£279 GBP
View
A
Retailer 4
-
€349 EUR
View
B+
Retailer 5
-
€508 EUR
$567 USD
View
B+
Retailer 6
-
€654 EUR
$731 USD
View
B+
Retailer 7
-
€691 EUR
$772 USD
View
Retailer 8
-
€838 EUR
SGD 1,265 SGD
View
Price last confirmed 20 days ago
B
Retailer 9
-
€949 EUR
$1,060 USD
View
Most Expensive
B
MOH London
LG817605189 · Nov 1
€951 EUR
£837 GBP
View
9 more retailers have this diamond
Prices start from €164 EURSave up to €788 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
€164 EUR