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1.29ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG766644317

Shape and cutting style on the report: Round brilliant

Certificate IGI LG766644317

Diamond specifications and retailer prices

From $369 USD
As of November 3, 2026
Save $646 USD (64%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $1,015 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG766644317 or 766644317. Listed at 10 retailers as of November 2, 2026, with prices from $369 to $1,015, a $646 spread on the same certified stone. MOH London lists it at $1,015. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG766644317
Dimensions6.94 × 6.89 × 4.35 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
6.94 mm6.89 mm1.29 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG766644317
Side View
Table 57.0%Crown 36.4°Girdle: THN-STKPavilion 40.8°Culet: NoneDepth 62.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 3
Current: $1,015 USD|Low: $108 USD|High: $1,044 USD|Avg: $466 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
November 4, 2026
Retailer 3$108 USD
Retailer 7$217 USD
Retailer 4$369 USD
Retailer 9$386 USD
Retailer 6$387 USD
Retailer 10$422 USD
Retailer 8$468 USD
Retailer 2$485 USD
Retailer 5$570 USD
Retailer 11$620 USD
MOH London$1,015 USD

34 data points across 11 retailers

10 retailers$369 USD to $1,015 USD

Retailer 1
-
$217 USD
Price last confirmed 12 days ago
A
Retailer 2
-
$369 USD
View
B+
Retailer 3
-
$386 USD
View
A
Retailer 4
-
$387 USD
View
A
Retailer 5
-
$422 USD
View
B+
Retailer 6
-
$468 USD
View
B+
Retailer 7
-
$485 USD
View
B
Retailer 8
-
$570 USD
View
B
Retailer 9
-
$620 USD
View
Most Expensive
B
MOH London
LG766644317 · Nov 2
$1,015 USD
£799 GBP
View
9 more retailers have this diamond
Prices start from $369 USDSave up to $646 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
$369 USD