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1.26ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG758581221

Shape and cutting style on the report: Round brilliant

Certificate IGI LG758581221

Diamond specifications and retailer prices

From $164 USD
As of October 29, 2026
Save $792 USD (83%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $956 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.26ct lab-grown round diamond

This 1.26ct 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 LG758581221 or 758581221. Listed at 12 retailers as of October 29, 2026, with prices from $164 to $956, a $792 spread on the same certified stone. MOH London lists it at $956. 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

1.26
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG758581221
Dimensions6.87 × 6.84 × 4.30 mm
L/W Ratio1.00
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
6.87 mm6.84 mm1.26 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG758581221
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.8%

Caratlytics Score

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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: $956 USD|Low: $163 USD|High: $996 USD|Avg: $412 USD|-3.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 7$164 USD
Retailer 8$184 USD
Retailer 12$210 USD
Retailer 5$350 USD
Retailer 2$359 USD
Retailer 11$366 USD
Retailer 10$397 USD
Retailer 9$455 USD
Retailer 4$475 USD
Retailer 6$524 USD
Retailer 3$590 USD
MOH London$956 USD

35 data points across 12 retailers

12 retailers$164 USD to $956 USD

A
Cheapest Retailer
-
$164 USD
A
Retailer 2
-
$184 USD
View
Final sale: no returns
A
Retailer 3
-
$210 USD
View
A
Retailer 4
-
$350 USD
€333 EUR
View
A
Retailer 5
-
$359 USD
£283 GBP
View
B+
Retailer 6
-
$366 USD
View
A
Retailer 7
-
$397 USD
View
B+
Retailer 8
-
$455 USD
View
Retailer 9
-
$475 USD
View
Price last confirmed 34 days ago
B+
Retailer 10
-
$524 USD
View
B
Retailer 11
-
$590 USD
View
Most Expensive
B
MOH London
LG758581221 · Oct 29
$956 USD
£753 GBP
View
11 more retailers have this diamond
Prices start from $164 USDSave up to $792 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
1.26ct Round
$164 USD