Round|Lab Grown|IGI

1.29ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG800683786

Shape and cutting style on the report: Round brilliant

Certificate IGI LG800683786

Diamond specifications and retailer prices

From $178 USD
As of November 1, 2026
Save $855 USD (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,033 USD at MOH London · As of November 1, 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG800683786 or 800683786. Listed at 14 retailers as of November 1, 2026, with prices from $178 to $1,033, a $855 spread on the same certified stone. MOH London lists it at $1,033. 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
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG800683786
Dimensions6.98 × 6.92 × 4.28 mm
L/W Ratio1.01
Girdle conditionFaceted
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
6.98 mm6.92 mm1.29 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG800683786
Side View
Table 57.0%Crown 35.2°Girdle: Slightly ThickPavilion 40.3°Culet: NoneDepth 61.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: $1,033 USD|Low: $169 USD|High: $1,044 USD|Avg: $427 USD|-1.1%
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$178 USD
Retailer 12$199 USD
Retailer 6$215 USD
Retailer 5$221 USD
Retailer 8$374 USD
Retailer 4$391 USD
Retailer 10$395 USD
Retailer 3$423 USD
Retailer 9$436 USD
Retailer 14$472 USD
Retailer 2$485 USD
Retailer 7$584 USD
Retailer 13$620 USD
MOH London$1,033 USD

34 data points across 14 retailers

14 retailers$178 USD to $1,033 USD

A
Cheapest Retailer
-
$178 USD
A
Retailer 2
-
$199 USD
View
Final sale: no returns
Retailer 3
-
$215 USD
View
Price last confirmed 52 days ago
Retailer 4
-
$221 USD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$374 USD
View
A
Retailer 6
-
$391 USD
View
A
Retailer 7
-
$395 USD
View
A
Retailer 8
-
$423 USD
View
A
Retailer 9
-
$436 USD
View
B+
Retailer 10
-
$472 USD
View
B+
Retailer 11
-
$485 USD
View
B+
Retailer 12
-
$584 USD
View
B
Retailer 13
-
$620 USD
View
Most Expensive
B
MOH London
LG800683786 · Nov 1
$1,033 USD
£813 GBP
View
13 more retailers have this diamond
Prices start from $178 USDSave up to $855 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
$178 USD