Round|Lab Grown|IGI

1.29ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG773657850

Shape and cutting style on the report: Round brilliant

Certificate IGI LG773657850

Diamond specifications and retailer prices

From $173 USD
As of November 1, 2026
Save $830 USD (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,003 USD at MOH London · As of November 2, 2026
View at MOH London

About this 1.29ct lab-grown round diamond

This 1.29ct 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 LG773657850 or 773657850. Listed at 14 retailers as of November 1, 2026, with prices from $173 to $1,003, a $830 spread on the same certified stone. MOH London lists it at $1,003. 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

1.29
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG773657850
Dimensions7.02 × 6.98 × 4.28 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
7.02 mm6.98 mm1.29 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG773657850
Side View
Table 57.0%Crown 34°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 61.1%

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: Nov 1
Current: $1,003 USD|Low: $166 USD|High: $1,033 USD|Avg: $413 USD|-2.8%
MOH London
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
November 4, 2026
Retailer 11$173 USD
Retailer 12$194 USD
Retailer 6$213 USD
Retailer 4$215 USD
Retailer 7$366 USD
Retailer 10$382 USD
Retailer 14$382 USD
Retailer 3$415 USD
Retailer 9$418 USD
Retailer 13$466 USD
Retailer 2$470 USD
Retailer 8$564 USD
Retailer 5$600 USD
MOH London$1,003 USD

35 data points across 14 retailers

14 retailers$173 USD to $1,003 USD

A
Cheapest Retailer
-
$173 USD
A
Retailer 2
-
$194 USD
View
Final sale: no returns
Retailer 3
-
$213 USD
View
Price last confirmed 52 days ago
Retailer 4
-
$215 USD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$366 USD
View
B+
Retailer 6
-
$382 USD
View
A
Retailer 7
-
$382 USD
View
A
Retailer 8
-
$415 USD
View
A
Retailer 9
-
$418 USD
View
B+
Retailer 10
-
$466 USD
View
B+
Retailer 11
-
$470 USD
View
B+
Retailer 12
-
$564 USD
View
B+
Retailer 13
-
$600 USD
View
Most Expensive
B
MOH London
LG773657850 · Nov 2
$1,003 USD
£790 GBP
View
13 more retailers have this diamond
Prices start from $173 USDSave up to $830 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
1.29ct Round
$173 USD