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Round|Lab Grown|IGI

3.57ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG678501209

Shape and cutting style on the report: Round brilliant

Certificate IGI LG678501209

Diamond specifications and retailer prices

From $862 USD
€821 EUR
As of October 29, 2026
Save $2,508 USD (74%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $3,370 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.57ct lab-grown round diamond

This 3.57ct lab-grown round sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG678501209 or 678501209. Listed at 15 retailers as of October 29, 2026, with prices from $862 to $3,370, a $2,508 spread on the same certified stone. Brilliant Earth lists it at $3,370. 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

3.57
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG678501209
Dimensions9.79 × 9.77 × 6.06 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
HEARTS & ARROWS This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.79 mm9.77 mm3.57 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG678501209
Side View
Table 58.0%Crown 35.1°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.0%

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 29
Current: $3,370 USD|Low: $534 USD|High: $3,700 USD|Avg: $1,382 USD|-8.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 4$534 USD
Retailer 3$722 USD
Retailer 5$862 USD
Retailer 9$880 USD
Retailer 12$973 USD
Retailer 10$1,006 USD
Retailer 2$1,040 USD
Retailer 11$1,151 USD
Retailer 6$1,617 USD
Retailer 8$1,920 USD
Retailer 7$2,629 USD
Brilliant Earth$3,370 USD

37 data points across 12 retailers

15 retailers$862 USD to $3,370 USD

Retailer 1
-
$430 USD
Price last confirmed 36 days ago
Retailer 2
-
$482 USD
View
Price last confirmed 36 days ago
Retailer 3
-
$527 USD
View
Price last confirmed 32 days ago
Retailer 4
-
$722 USD
£569 GBP
View
Price last confirmed 22 days ago
A
Retailer 5
-
$862 USD
€821 EUR
View
B+
Retailer 6
-
$880 USD
View
B+
Retailer 7
-
$973 USD
View
A
Retailer 8
-
$1,006 USD
View
B+
Retailer 9
-
$1,040 USD
£819 GBP
View
B+
Retailer 10
-
$1,151 USD
View
B
Retailer 11
-
$1,617 USD
View
Retailer 12
-
$1,716 USD
View
Price last confirmed 33 days ago
B
Retailer 13
-
$1,920 USD
View
B
Retailer 14
-
$2,629 USD
£2,070 GBP
View
Most Expensive
B
Brilliant Earth
12973906A · Oct 29
$3,370 USD
View
14 more retailers have this diamond
Prices start from $862 USDSave up to $2,508 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
3.57ct Round
$862 USD