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Round|Lab Grown|IGI

1.28ct E SI2 Round Lab Grown Diamond

VG • E/SI2 • IGI LG534223885

Shape and cutting style on the report: Round brilliant

Certificate IGI LG534223885

Diamond specifications and retailer prices

From $392 USD
As of October 29, 2026
Save $634 USD (62%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,026 USD at MOH London · As of October 25, 2026
View at MOH London

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 SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI LG534223885 or 534223885. Listed at 5 retailers as of October 25, 2026, with prices from $392 to $1,026, a $634 spread on the same certified stone. MOH London lists it at $1,026. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.28
Carat
E
Color
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG534223885
Dimensions6.97 × 6.91 × 4.19 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.97 mm6.91 mm1.28 ctE / SI2
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG534223885
Side View
Table 60.0%Crown 35.4°Girdle: MED-STKPavilion 39.8°Culet: NoneDepth 60.3%

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: $1,026 USD|Low: $270 USD|High: $1,173 USD|Avg: $503 USD|-11.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 30, 2026
Retailer 4$270 USD
Retailer 5$392 USD
Retailer 2$393 USD
Retailer 3$440 USD
MOH London$1,026 USD

40 data points across 5 retailers

5 retailers$392 USD to $1,026 USD

Retailer 1
-
$270 USD
Price last confirmed 9 days ago
B+
Retailer 2
-
$392 USD
View
A
Retailer 3
-
$393 USD
£309 GBP
View
Retailer 4
-
$440 USD
View
Price last confirmed 9 days ago
Most Expensive
B
MOH London
LG534223885 · Oct 25
$1,026 USD
£808 GBP
View
4 more retailers have this diamond
Prices start from $392 USDSave up to $634 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
$392 USD