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1.28ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG605351685

Shape and cutting style on the report: Round brilliant

Certificate IGI LG605351685

Diamond specifications and retailer prices

From $169 USD
As of October 29, 2026
Save $1,451 USD (90%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $1,620 USD at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 1.28ct lab-grown round diamond

This 1.28ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG605351685 or 605351685. Listed at 10 retailers as of October 29, 2026, with prices from $169 to $1,620, a $1,451 spread on the same certified stone. Do Amore Diamonds lists it at $1,620. 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

1.28
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG605351685
Dimensions7.00 × 7.01 × 4.21 mm
L/W Ratio1.00
Girdle conditionFaceted
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
7.00 mm7.01 mm1.28 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG605351685
Side View
Table 59.0%Crown 33.5°Girdle: MediumPavilion 40.6°Culet: NoneDepth 60.1%

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: Oct 29
Current: $1,620 USD|Low: $131 USD|High: $1,620 USD|Avg: $712 USD|+3.2%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 26, 2026
Retailer 8$169 USD
Retailer 11$185 USD
Retailer 6$196 USD
Retailer 10$375 USD
Retailer 4$397 USD
Retailer 13$461 USD
Retailer 3$517 USD
Retailer 7$711 USD
Retailer 9$743 USD
Retailer 5$840 USD
Retailer 2$1,082 USD
Retailer 12$1,371 USD
Do Amore Diamonds$1,620 USD

16 data points across 13 retailers

10 retailers$169 USD to $1,620 USD

A
Cheapest Retailer
-
$169 USD
A
Retailer 2
-
$185 USD
View
Final sale: no returns
A
Retailer 3
-
$196 USD
View
B+
Retailer 4
-
$375 USD
View
B
Retailer 5
-
$711 USD
View
B
Retailer 6
-
$743 USD
View
B
Retailer 7
-
$840 USD
View
B
Retailer 8
-
$1,082 USD
£852 GBP
View
B
Retailer 9
-
$1,400 USD
View
Most Expensive
B
Do Amore Diamonds
27-436365E1A · Oct 29
$1,620 USD
View
9 more retailers have this diamond
Prices start from $169 USDSave up to $1,451 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
1.28ct Round
$169 USD