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Round|Lab Grown|IGI

1.66ct H SI1 Round Lab Grown Diamond

VG • H/SI1 • IGI LG754510430

Shape and cutting style on the report: Round brilliant

Certificate IGI LG754510430

Diamond specifications and retailer prices

From €172 EUR
$193 USD
As of November 1, 2026
Save €828 EUR (83%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: €1,000 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG754510430 or 754510430. Listed at 12 retailers as of November 1, 2026, with prices from €172 to €1,000, a €828 spread on the same certified stone. MOH London lists it at €1,000. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.66
Carat
H
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754510430
Dimensions7.49 × 7.44 × 4.81 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.49 mm7.44 mm1.66 ctH / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754510430
Side View
Table 56.0%Crown 37°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 64.4%

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: €1,000 EUR|Low: €172 EUR|High: €1,275 EUR|Avg: €594 EUR|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 1, 2026
Retailer 6€172 EUR
Retailer 12€200 EUR
Retailer 7€214 EUR
Retailer 4€219 EUR
Retailer 3€364 EUR
Retailer 13€374 EUR
Retailer 11€448 EUR
Retailer 10€588 EUR
Retailer 8€687 EUR
Retailer 9€690 EUR
Retailer 5€779 EUR
Retailer 2€802 EUR
MOH London€1,000 EUR

24 data points across 13 retailers

12 retailers€172 EUR to €1,000 EUR

A
Cheapest Retailer
-
€172 EUR
$193 USD
A
Retailer 2
-
€200 EUR
$224 USD
View
A
Retailer 3
-
€214 EUR
$240 USD
View
Retailer 4
-
€219 EUR
$246 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
€364 EUR
View
B+
Retailer 6
-
€374 EUR
$419 USD
View
A
Retailer 7
-
€448 EUR
$503 USD
View
A
Retailer 8
-
€588 EUR
$660 USD
View
A
Retailer 9
-
€687 EUR
$771 USD
View
A
Retailer 10
-
€690 EUR
$774 USD
View
B+
Retailer 11
-
€802 EUR
$900 USD
View
Most Expensive
A
MOH London
LG754510430 · Nov 1
€1,000 EUR
£883 GBP
View
11 more retailers have this diamond
Prices start from €172 EURSave up to €828 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
€172 EUR