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Oval|Lab Grown|IGI

1.66ct D IF Oval Lab Grown Diamond

ID • D/IF • IGI LG784654034

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG784654034

Diamond specifications and retailer prices

From $456 USD
As of November 1, 2026
Save $4,854 USD (91%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $5,310 USD 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG784654034 or 784654034. Listed at 25 retailers as of November 1, 2026, with prices from $456 to $5,310, a $4,854 spread on the same certified stone. Brilliant Earth lists it at $5,310. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.66
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.1°
Pavilion angle39.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784654034
Dimensions9.61 × 6.60 × 4.08 mm
L/W Ratio1.46
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
9.61 mm6.60 mm1.66 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784654034
Side View
Table 61.0%Crown 37.1°Girdle: STK-THKPavilion 39.6°Culet: NoneDepth 61.8%

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: $5,310 USD|Low: $438 USD|High: $5,310 USD|Avg: $1,421 USD
Brilliant Earth
Retailer 2
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Retailer 23
November 3, 2026
Retailer 15$456 USD
Retailer 7$510 USD
Retailer 22$510 USD
Retailer 9$565 USD
Retailer 11$614 USD
Retailer 6$705 USD
Retailer 4$755 USD
Retailer 3$808 USD
Retailer 10$883 USD
Retailer 2$935 USD
Retailer 20$948 USD
Retailer 17$974 USD
Retailer 16$1,249 USD
Retailer 13$1,321 USD
Retailer 14$1,328 USD
Retailer 8$1,786 USD
Retailer 21$1,816 USD
Retailer 12$1,847 USD
Retailer 5$2,009 USD
Retailer 23$2,059 USD
Retailer 18$2,075 USD
Retailer 19$2,114 USD
Brilliant Earth$5,310 USD

34 data points across 23 retailers

25 retailers$456 USD to $5,310 USD

A
Cheapest Retailer
-
$456 USD
A
Retailer 2
-
$510 USD
View
Final sale: no returns
A
Retailer 3
-
$510 USD
View
A
Retailer 4
-
$565 USD
View
Retailer 5
-
$566 USD
View
Price last confirmed 17 days ago
A
Retailer 6
-
$614 USD
HK$4,800 HKD
View
A
Retailer 7
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$705 USD
View
A
Retailer 8
-
$755 USD
View
A
Retailer 9
-
$808 USD
View
A
Retailer 10
-
$883 USD
A$1,358 AUD
View
A
Retailer 11
-
$935 USD
£736 GBP
View
A
Retailer 12
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$948 USD
€903 EUR
View
A
Retailer 13
-
$974 USD
ZAR 15,737 ZAR
View
B+
Retailer 14
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$1,249 USD
View
B+
Retailer 15
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$1,321 USD
View
Retailer 16
-
$1,328 USD
A$2,043 AUD
View
Price last confirmed 14 days ago
B+
Retailer 17
-
$1,786 USD
SGD 2,413 SGD
View
B+
Retailer 18
-
$1,816 USD
View
B+
Retailer 19
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$1,847 USD
View
B+
Retailer 20
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$2,009 USD
View
B+
Retailer 21
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$2,059 USD
A$3,168 AUD
View
B+
Retailer 22
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$2,075 USD
£1,634 GBP
View
B
Retailer 23
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$2,114 USD
View
Retailer 24
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$2,748 USD
View
Price last confirmed 63 days ago
Most Expensive
B
Brilliant Earth
18645280A · Nov 2
$5,310 USD
View
24 more retailers have this diamond
Prices start from $456 USDSave up to $4,854 USD

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
$456 USD