Radiant|Lab Grown|IGI

3.09ct I SI1 Radiant Lab Grown Diamond

ID • I/SI1 • IGI LG522239756

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG522239756

Diamond specifications and retailer prices

From $664 USD
As of October 30, 2026
Save $6,126 USD (90%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $9,178 USD at Ting Diamond · As of November 1, 2026
View at Ting Diamond

About this 3.09ct lab-grown radiant diamond

This 3.09ct lab-grown radiant sits in the three to five carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG522239756 or 522239756. Listed at 16 retailers as of October 30, 2026, with a 923% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
I
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.4°
Pavilion angle32.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG522239756
Dimensions9.84 × 7.49 × 4.70 mm
L/W Ratio1.31
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
9.84 mm7.49 mm3.09 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG522239756
Side View
Table 67.0%Crown 44.4°Girdle: STK-THKPavilion 32.3°Culet: NoneDepth 62.8%

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: Oct 30
Current: $916 USD|Low: $637 USD|High: $9,178 USD|Avg: $2,447 USD|-1.3%
Retailer 1
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
Ting Diamond
November 1, 2026
Retailer 12$664 USD
Retailer 16$722 USD
Retailer 3$742 USD
Retailer 2$770 USD
Retailer 13$770 USD
Retailer 1$916 USD
Retailer 9$945 USD
Retailer 5$1,076 USD
Retailer 4$1,165 USD
Retailer 15$1,255 USD
Retailer 11$1,967 USD
Retailer 14$2,165 USD
Retailer 6$2,656 USD
Retailer 10$3,247 USD
Retailer 8$5,062 USD
Retailer 7$6,790 USD
Ting Diamond$9,178 USD

39 data points across 17 retailers

16 retailers$664 USD to $6,790 USD

A
Cheapest Retailer
-
$664 USD
A
Retailer 2
-
$722 USD
View
A
Retailer 3
-
$742 USD
View
Final sale: no returns
A
Retailer 4
-
$770 USD
View
Retailer 5
-
$770 USD
View
Price last confirmed 16 days ago
A
Retailer 6
-
$916 USD
£721 GBP
View
A
Retailer 7
-
$945 USD
View
A
Retailer 8
-
$1,076 USD
View
B+
Retailer 9
-
$1,165 USD
View
B+
Retailer 10
-
$1,255 USD
View
B+
Retailer 11
-
$1,967 USD
View
B+
Retailer 12
-
$2,165 USD
View
B+
Retailer 13
-
$2,656 USD
View
B
Retailer 14
-
$3,247 USD
£2,557 GBP
View
B
Retailer 15
-
$6,790 USD
View
Most Expensive
Ting Diamond
10185574 · Nov 1
$9,178 USD
HK$71,700 HKD
View
Price under review
15 more retailers have this diamond
Prices start from $664 USDSave up to $6,126 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 Radiant
$664 USD