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Oval|Lab Grown|IGI

1.66ct D SI1 Oval Lab Grown Diamond

ID • D/SI1 • IGI LG520284681

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG520284681

Diamond specifications and retailer prices

From €195 EUR
$219 USD
As of November 1, 2026
Save €946 EUR (83%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: €1,141 EUR at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.66ct lab-grown oval diamond

This 1.66ct lab-grown oval 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 LG520284681 or 520284681. Listed at 17 retailers as of November 1, 2026, with prices from €195 to €1,141, a €946 spread on the same certified stone. Brilliant Earth lists it at €1,141. 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
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG520284681
Dimensions9.55 × 6.80 × 4.10 mm
L/W Ratio1.40
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
9.55 mm6.80 mm1.66 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG520284681
Side View
Table 60.5%Crown 36.5°Girdle: MED-STKPavilion 39.4°Culet: NoneDepth 60.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: €1,141 EUR|Low: €195 EUR|High: €1,141 EUR|Avg: €567 EUR
Brilliant Earth
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
Retailer 16
November 2, 2026
Retailer 8€195 EUR
Retailer 6€218 EUR
Retailer 5€226 EUR
Retailer 14€242 EUR
Retailer 2€269 EUR
Retailer 16€325 EUR
Retailer 9€449 EUR
Retailer 12€471 EUR
Retailer 15€473 EUR
Retailer 4€521 EUR
Retailer 3€777 EUR
Retailer 13€780 EUR
Retailer 7€825 EUR
Retailer 10€865 EUR
Retailer 11€969 EUR
Brilliant Earth€1,141 EUR

36 data points across 16 retailers

17 retailers€195 EUR to €1,141 EUR

A
Cheapest Retailer
-
€195 EUR
$219 USD
A
Retailer 2
-
€218 EUR
$245 USD
View
Final sale: no returns
A
Retailer 3
-
€226 EUR
$254 USD
View
A
Retailer 4
-
€242 EUR
$271 USD
View
Retailer 5
-
€261 EUR
$293 USD
View
Price last confirmed 8 days ago
A
Retailer 6
-
€269 EUR
£238 GBP
View
B+
Retailer 7
-
€325 EUR
$365 USD
View
A
Retailer 8
-
€449 EUR
£397 GBP
View
A
Retailer 9
-
€471 EUR
View
A
Retailer 10
-
€473 EUR
$531 USD
View
B+
Retailer 11
-
€521 EUR
$584 USD
View
B+
Retailer 12
-
€777 EUR
$872 USD
View
B+
Retailer 13
-
€780 EUR
$875 USD
View
B+
Retailer 14
-
€825 EUR
$925 USD
View
B+
Retailer 15
-
€865 EUR
$970 USD
View
B
Retailer 16
-
€969 EUR
£856 GBP
View
Most Expensive
B
Brilliant Earth
11225627A · Nov 2
€1,141 EUR
$1,280 USD
View
16 more retailers have this diamond
Prices start from €195 EURSave up to €946 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 Oval
€195 EUR