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Round|Lab Grown|IGI

8.30ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG670428663

Shape and cutting style on the report: Round brilliant

Certificate IGI LG670428663

Diamond specifications and retailer prices

From $2,499 NZD
$1,406 USD
As of November 1, 2026
Save $17,958 NZD (88%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $20,457 NZD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 8.3ct lab-grown round diamond

This 8.3ct lab-grown round 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 LG670428663 or 670428663. Listed at 19 retailers as of November 1, 2026, with prices from $2,499 to $20,457, a $17,958 spread on the same certified stone. Brilliant Earth lists it at $20,457. 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

8.30
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG670428663
Dimensions12.99 × 13.04 × 7.88 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.99 mm13.04 mm8.30 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG670428663
Side View
Table 59.0%Crown 35.4°Girdle: MediumPavilion 40.3°Culet: NoneDepth 60.6%

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: Nov 1
Current: $20,457 NZD|Low: $2,399 NZD|High: $20,457 NZD|Avg: $5,920 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
November 2, 2026
Retailer 4$2,499 NZD
Retailer 3$2,719 NZD
Retailer 5$2,899 NZD
Retailer 8$2,899 NZD
Retailer 15$3,199 NZD
Retailer 9$3,449 NZD
Retailer 11$4,075 NZD
Retailer 13$4,145 NZD
Retailer 2$4,918 NZD
Retailer 10$5,143 NZD
Retailer 16$5,219 NZD
Retailer 6$5,433 NZD
Retailer 7$6,613 NZD
Retailer 12$8,279 NZD
Retailer 14$9,882 NZD
Brilliant Earth$20,457 NZD

33 data points across 16 retailers

19 retailers$2,499 NZD to $20,457 NZD

A
Cheapest Retailer
-
$2,499 NZD
$1,406 USD
A
Retailer 2
-
$2,719 NZD
$1,530 USD
View
Retailer 3
-
$2,899 NZD
$1,631 USD
View
Price last confirmed 21 days ago
A
Retailer 4
-
$2,899 NZD
$1,631 USD
View
A
Retailer 5
-
$2,931 NZD
$1,649 USD
View
Final sale: no returns
A
Retailer 6
-
$3,199 NZD
$1,800 USD
View
B+
Retailer 7
-
$3,449 NZD
£1,528 GBP
View
B+
Retailer 8
-
$3,796 NZD
$2,136 USD
View
B+
Retailer 9
-
$4,075 NZD
£1,805 GBP
View
B+
Retailer 10
-
$4,145 NZD
$2,332 USD
View
B+
Retailer 11
-
$4,918 NZD
$2,767 USD
View
B+
Retailer 12
-
$5,143 NZD
€2,756 EUR
View
B+
Retailer 13
-
$5,219 NZD
A$4,518 AUD
View
B
Retailer 14
-
$5,433 NZD
$3,057 USD
View
B
Retailer 15
-
$6,613 NZD
$3,721 USD
View
B
Retailer 16
-
$8,279 NZD
£3,668 GBP
View
B
Retailer 17
-
$9,882 NZD
$5,560 USD
View
B
Retailer 18
-
$10,196 NZD
$5,737 USD
View
Most Expensive
B
Brilliant Earth
16242502A · Nov 2
$20,457 NZD
$11,510 USD
View
18 more retailers have this diamond
Prices start from $2,499 NZDSave up to $17,958 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
8.30ct Round
$2,499 NZD