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Oval|Lab Grown|IGI

12.83ct F SI1 Oval Lab Grown Diamond

ID • F/SI1 • IGI LG573313066

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG573313066

Diamond specifications and retailer prices

From $2,948 AUD
£1,631 GBP
As of October 27, 2026
Save $23,403 AUD (89%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $26,351 AUD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 12.83ct lab-grown oval diamond

This 12.83ct lab-grown oval sits in the over five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG573313066 or 573313066. Listed at 12 retailers as of October 27, 2026, with prices from $2,948 to $26,351, a $23,403 spread on the same certified stone. Brilliant Earth lists it at $26,351. 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

12.83
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG573313066
Dimensions19.20 × 13.12 × 8.20 mm
L/W Ratio1.46
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
19.20 mm13.12 mm12.83 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG573313066
Side View
Table 59.5%Crown 36.4°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
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: Oct 27
Current: $28,600 AUD|Low: $2,948 AUD|High: $32,560 AUD|Avg: $15,422 AUD
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
Retailer 17
Retailer 18
November 1, 2026
Retailer 16$2,948 AUD
Retailer 12$4,155 AUD
Retailer 17$5,232 AUD
Retailer 7$5,722 AUD
Retailer 11$6,145 AUD
Retailer 13$6,305 AUD
Retailer 6$6,311 AUD
Retailer 5$7,547 AUD
Retailer 2$8,442 AUD
Retailer 4$9,117 AUD
Retailer 18$12,491 AUD
Retailer 14$15,987 AUD
Retailer 3$17,680 AUD
Retailer 15$19,660 AUD
Brilliant Earth$28,600 AUD
Retailer 8$30,123 AUD
Retailer 10$30,123 AUD
Retailer 9$32,560 AUD

11 data points across 18 retailers

12 retailers$2,948 AUD to $26,351 AUD

A
Cheapest Retailer
-
$2,948 AUD
£1,631 GBP
A
Retailer 2
-
$4,155 AUD
$2,919 USD
View
B+
Retailer 3
-
$5,232 AUD
$3,675 USD
View
B
Retailer 4
-
$6,145 AUD
£3,399 GBP
View
B
Retailer 5
-
$6,305 AUD
$4,429 USD
View
B
Retailer 6
-
$8,442 AUD
$5,930 USD
View
B
Retailer 7
-
$9,117 AUD
$6,404 USD
View
B
Retailer 8
-
$12,491 AUD
$8,774 USD
View
B
Retailer 9
-
$15,987 AUD
$11,230 USD
View
B
Retailer 10
-
$17,680 AUD
$12,419 USD
View
B
Retailer 11
-
$19,660 AUD
$13,810 USD
View
Most Expensive
B
Brilliant Earth
22301618A · Oct 31
$26,351 AUD
$18,510 USD
View
11 more retailers have this diamond
Prices start from $2,948 AUDSave up to $23,403 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
12.83ct Oval
$2,948 AUD