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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 $3,681 NZD
£1,631 GBP
As of October 27, 2026
Save $29,217 NZD (89%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $32,898 NZD 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 $3,681 to $32,898, a $29,217 spread on the same certified stone. Brilliant Earth lists it at $32,898. 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: $35,706 NZD|Low: $3,681 NZD|High: $40,649 NZD|Avg: $19,254 NZD
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$3,681 NZD
Retailer 12$5,188 NZD
Retailer 17$6,532 NZD
Retailer 7$7,143 NZD
Retailer 11$7,672 NZD
Retailer 13$7,872 NZD
Retailer 6$7,879 NZD
Retailer 5$9,422 NZD
Retailer 2$10,539 NZD
Retailer 4$11,382 NZD
Retailer 18$15,594 NZD
Retailer 14$19,959 NZD
Retailer 3$22,072 NZD
Retailer 15$24,545 NZD
Brilliant Earth$35,706 NZD
Retailer 8$37,608 NZD
Retailer 10$37,608 NZD
Retailer 9$40,649 NZD

11 data points across 18 retailers

12 retailers$3,681 NZD to $32,898 NZD

A
Cheapest Retailer
-
$3,681 NZD
£1,631 GBP
A
Retailer 2
-
$5,188 NZD
$2,919 USD
View
B+
Retailer 3
-
$6,532 NZD
$3,675 USD
View
B
Retailer 4
-
$7,672 NZD
£3,399 GBP
View
B
Retailer 5
-
$7,872 NZD
$4,429 USD
View
B
Retailer 6
-
$10,539 NZD
$5,930 USD
View
B
Retailer 7
-
$11,382 NZD
$6,404 USD
View
B
Retailer 8
-
$15,594 NZD
$8,774 USD
View
B
Retailer 9
-
$19,959 NZD
$11,230 USD
View
B
Retailer 10
-
$22,072 NZD
$12,419 USD
View
B
Retailer 11
-
$24,545 NZD
$13,810 USD
View
Most Expensive
B
Brilliant Earth
22301618A · Oct 31
$32,898 NZD
$18,510 USD
View
11 more retailers have this diamond
Prices start from $3,681 NZDSave up to $29,217 NZD

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
$3,681 NZD