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Round|Lab Grown|IGI

3.09ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG685591087

Shape and cutting style on the report: Round brilliant

Certificate IGI LG685591087

Diamond specifications and retailer prices

From $333 USD
As of November 5, 2026
Save $1,412 USD (81%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,745 USD at Rare Carat · As of November 4, 2026
View at Rare Carat

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 LG685591087 or 685591087. Listed at 13 retailers as of November 4, 2026, with prices from $333 to $1,745, a $1,412 spread on the same certified stone. Rare Carat lists it at $1,745. 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
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG685591087
Dimensions9.39 × 9.36 × 5.73 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
9.39 mm9.36 mm3.09 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG685591087
Side View
Table 58.0%Crown 34.4°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $1,745 USD|Low: $333 USD|High: $4,340 USD|Avg: $1,463 USD|-3.6%
Rare Carat
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
November 6, 2026
Retailer 11$333 USD
Retailer 8$413 USD
Retailer 3$460 USD
Retailer 14$565 USD
Retailer 2$571 USD
Retailer 15$664 USD
Retailer 5$666 USD
Retailer 9$729 USD
Retailer 4$962 USD
Retailer 13$1,210 USD
Retailer 10$1,327 USD
Retailer 12$1,649 USD
Rare Carat$1,745 USD
Retailer 6$4,253 USD
Retailer 7$4,340 USD

10 data points across 15 retailers

13 retailers$333 USD to $1,745 USD

A
Cheapest Retailer
-
$333 USD
A
Retailer 2
-
$413 USD
View
A
Retailer 3
-
$460 USD
View
A
Retailer 4
-
$565 USD
View
A
Retailer 5
-
$571 USD
View
Retailer 6
-
$664 USD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$666 USD
View
A
Retailer 8
-
$729 USD
View
A
Retailer 9
-
$962 USD
View
B+
Retailer 10
-
$1,210 USD
View
B+
Retailer 11
-
$1,327 USD
View
B
Retailer 12
-
$1,649 USD
View
Most Expensive
B
Rare Carat
KI0875910KF685 · Nov 4
$1,745 USD
View
12 more retailers have this diamond
Prices start from $333 USDSave up to $1,412 USD

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
$333 USD