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Oval|Lab Grown|IGI

1.66ct D IF Oval Lab Grown Diamond

EX • D/IF • IGI LG731583042

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG731583042

Diamond specifications and retailer prices

From $297 USD
As of November 1, 2026
Save $2,833 USD (91%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: $3,130 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 LG731583042 or 731583042. Listed at 28 retailers as of November 1, 2026, with prices from $297 to $3,130, a $2,833 spread on the same certified stone. Brilliant Earth lists it at $3,130. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731583042
Dimensions9.52 × 6.71 × 4.18 mm
L/W Ratio1.42
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
9.52 mm6.71 mm1.66 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731583042
Side View
Table 60.0%Crown 34.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.3%

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: $3,130 USD|Low: $285 USD|High: $3,940 USD|Avg: $1,103 USD|-20.6%
Brilliant Earth
Retailer 2
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Retailer 24
November 2, 2026
Retailer 5$297 USD
Retailer 16$332 USD
Retailer 6$368 USD
Retailer 8$368 USD
Retailer 22$410 USD
Retailer 19$512 USD
Retailer 21$515 USD
Retailer 18$600 USD
Retailer 10$633 USD
Retailer 13$634 USD
Retailer 2$646 USD
Retailer 23$727 USD
Retailer 20$855 USD
Retailer 4$1,130 USD
Retailer 9$1,182 USD
Retailer 14$1,194 USD
Retailer 15$1,230 USD
Retailer 12$1,414 USD
Retailer 3$1,481 USD
Retailer 11$1,502 USD
Retailer 17$1,541 USD
Retailer 7$2,066 USD
Retailer 24$2,775 USD
Brilliant Earth$3,130 USD

36 data points across 24 retailers

28 retailers$297 USD to $3,130 USD

A
Cheapest Retailer
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$297 USD
Retailer 2
-
$307 USD
View
Price last confirmed 42 days ago
A
Retailer 3
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$332 USD
View
Final sale: no returns
Retailer 4
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$368 USD
View
Price last confirmed 8 days ago
A
Retailer 5
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$368 USD
View
Retailer 6
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$376 USD
View
Price last confirmed 42 days ago
A
Retailer 7
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$410 USD
HK$3,200 HKD
View
A
Retailer 8
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$512 USD
View
A
Retailer 9
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$515 USD
View
A
Retailer 10
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$600 USD
€571 EUR
View
A
Retailer 11
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$633 USD
View
A
Retailer 12
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$634 USD
ZAR 10,244 ZAR
View
A
Retailer 13
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$646 USD
£509 GBP
View
A
Retailer 14
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$727 USD
A$1,118 AUD
View
A
Retailer 15
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$855 USD
A$1,316 AUD
View
B+
Retailer 16
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$1,130 USD
View
B+
Retailer 17
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$1,182 USD
View
B+
Retailer 18
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$1,194 USD
View
B+
Retailer 19
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$1,230 USD
View
B+
Retailer 20
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$1,291 USD
View
B+
Retailer 21
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$1,414 USD
View
Retailer 22
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$1,481 USD
£1,166 GBP
View
Price last confirmed 12 days ago
B+
Retailer 23
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$1,502 USD
View
B+
Retailer 24
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$1,541 USD
View
Retailer 25
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$2,066 USD
A$3,179 AUD
View
Price last confirmed 25 days ago
B
Retailer 26
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$2,775 USD
View
B
Retailer 27
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$3,023 USD
£2,380 GBP
View
Most Expensive
B
Brilliant Earth
15722860A · Nov 2
$3,130 USD
View
27 more retailers have this diamond
Prices start from $297 USDSave up to $2,833 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
$297 USD