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Oval|Lab Grown|IGI

1.66ct E SI1 Oval Lab Grown Diamond

ID • E/SI1 • IGI LG627421853

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG627421853

Diamond specifications and retailer prices

From $433 AUD
$304 USD
As of November 1, 2026
Save $1,737 AUD (80%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $2,170 AUD at Reve Diamonds · As of November 1, 2026
View at Reve Diamonds

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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG627421853 or 627421853. Listed at 20 retailers as of November 1, 2026, with prices from $433 to $2,170, a $1,737 spread on the same certified stone. Reve Diamonds lists it at $2,170. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG627421853
Dimensions9.36 × 6.73 × 4.18 mm
L/W Ratio1.39
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.36 mm6.73 mm1.66 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG627421853
Side View
Table 61.0%Crown 35°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 62.1%

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: $945 AUD|Low: $416 AUD|High: $2,634 AUD|Avg: $1,149 AUD|+0.4%
Retailer 1
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
Reve Diamonds
November 2, 2026
Retailer 14$433 AUD
Retailer 8$483 AUD
Retailer 4$501 AUD
Retailer 15$537 AUD
Retailer 10$686 AUD
Retailer 3$755 AUD
Retailer 16$810 AUD
Retailer 11$873 AUD
Retailer 7$876 AUD
Retailer 1$945 AUD
Retailer 12$970 AUD
Retailer 6$1,382 AUD
Retailer 5$1,395 AUD
Retailer 2$1,723 AUD
Retailer 13$1,794 AUD
Retailer 9$2,148 AUD
Reve Diamonds$2,170 AUD

37 data points across 17 retailers

20 retailers$433 AUD to $2,170 AUD

A
Cheapest Retailer
-
$433 AUD
$304 USD
A
Retailer 2
-
$483 AUD
$339 USD
View
Final sale: no returns
A
Retailer 3
-
$501 AUD
$352 USD
View
A
Retailer 4
-
$537 AUD
$377 USD
View
Retailer 5
-
$537 AUD
$377 USD
View
Price last confirmed 16 days ago
A
Retailer 6
-
$686 AUD
£380 GBP
View
A
Retailer 7
-
$755 AUD
$530 USD
View
A
Retailer 8
-
$810 AUD
$569 USD
View
B+
Retailer 9
-
$873 AUD
€584 EUR
View
B+
Retailer 10
-
$876 AUD
$615 USD
View
B+
Retailer 11
-
$945 AUD
£522 GBP
View
B+
Retailer 12
-
$970 AUD
View
B+
Retailer 13
-
$1,019 AUD
$716 USD
View
B+
Retailer 14
-
$1,382 AUD
$971 USD
View
Retailer 15
-
$1,395 AUD
$980 USD
View
Price last confirmed 11 days ago
B
Retailer 16
-
$1,723 AUD
$1,210 USD
View
B
Retailer 17
-
$1,790 AUD
$1,258 USD
View
B
Retailer 18
-
$1,794 AUD
$1,260 USD
View
B
Retailer 19
-
$2,148 AUD
£1,188 GBP
View
Most Expensive
B
Reve Diamonds
D564D4A9A · Nov 1
$2,170 AUD
$1,524 USD
View
19 more retailers have this diamond
Prices start from $433 AUDSave up to $1,737 AUD

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
$433 AUD