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Round|Lab Grown|IGI

3.09ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG821689508

Shape and cutting style on the report: Round brilliant

Certificate IGI LG821689508

Diamond specifications and retailer prices

From $749 NZD
As of November 5, 2026
Save $6,224 NZD (89%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $6,973 NZD at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

About this 3.09ct lab-grown round diamond

This 3.09ct lab-grown round sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG821689508 or 821689508. Listed at 17 retailers as of November 5, 2026, with prices from $749 to $6,973, a $6,224 spread on the same certified stone. Brilliant Earth lists it at $6,973. 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

3.09
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821689508
Dimensions9.36 × 9.40 × 5.74 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.36 mm9.40 mm3.09 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821689508
Side View
Table 58.0%Crown 33.2°Girdle: MediumPavilion 41.2°Culet: NoneDepth 61.2%

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 5
Current: $6,973 NZD|Low: $749 NZD|High: $6,973 NZD|Avg: $2,241 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
November 6, 2026
Retailer 11$749 NZD
Retailer 4$929 NZD
Retailer 8$1,192 NZD
Retailer 10$1,299 NZD
Retailer 12$1,466 NZD
Retailer 6$1,510 NZD
Retailer 2$1,583 NZD
Retailer 3$1,766 NZD
Retailer 9$2,606 NZD
Retailer 7$3,104 NZD
Retailer 5$3,401 NZD
Brilliant Earth$6,973 NZD

40 data points across 12 retailers

17 retailers$749 NZD to $6,973 NZD

A
Cheapest Retailer
-
$749 NZD
Retailer 2
-
$749 NZD
View
Price last confirmed 45 days ago
A
Retailer 3
-
$840 NZD
View
Retailer 4
-
$916 NZD
View
Price last confirmed 45 days ago
A
Retailer 5
-
$929 NZD
View
Retailer 6
-
$929 NZD
View
Price last confirmed 12 days ago
A
Retailer 7
-
$1,192 NZD
View
B+
Retailer 8
-
$1,466 NZD
View
A
Retailer 9
-
$1,510 NZD
View
Retailer 10
-
$1,583 NZD
View
A
Retailer 11
-
$1,766 NZD
View
B
Retailer 12
-
$2,606 NZD
View
Retailer 13
-
$2,987 NZD
View
Price last confirmed 46 days ago
B
Retailer 14
-
$2,987 NZD
View
B
Retailer 15
-
$3,104 NZD
View
B
Retailer 16
-
$3,401 NZD
View
Most Expensive
B
Brilliant Earth
21445474A · Nov 5
$6,973 NZD
$3,920 USD
View
16 more retailers have this diamond
Prices start from $749 NZDSave up to $6,224 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
3.09ct Round
$749 NZD