Round|Lab Grown|IGI

1.27ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG819612840

Shape and cutting style on the report: Round brilliant

Certificate IGI LG819612840

Diamond specifications and retailer prices

From $368 USD
As of November 6, 2026
Save $722 USD (66%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $1,090 USD at MOH London · As of November 5, 2026
View at MOH London

About this 1.27ct lab-grown round diamond

This 1.27ct 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 LG819612840 or 819612840. Listed at 10 retailers as of November 5, 2026, with prices from $368 to $1,090, a $722 spread on the same certified stone. MOH London lists it at $1,090. 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

1.27
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG819612840
Dimensions6.91 × 6.87 × 4.30 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.91 mm6.87 mm1.27 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG819612840
Side View
Table 59.0%Crown 35.5°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 62.5%

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: Nov 6
Current: $1,090 USD|Low: $285 USD|High: $1,105 USD|Avg: $630 USD|+10.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 8$368 USD
Retailer 5$371 USD
Retailer 9$427 USD
Retailer 2$493 USD
Retailer 3$500 USD
Retailer 7$668 USD
Retailer 4$928 USD
Retailer 6$990 USD
MOH London$1,090 USD

45 data points across 9 retailers

10 retailers$368 USD to $1,090 USD

B+
Cheapest Retailer
-
$368 USD
A
Retailer 2
-
$371 USD
View
A
Retailer 3
-
$427 USD
View
B+
Retailer 4
-
$493 USD
View
B+
Retailer 5
-
$500 USD
View
B+
Retailer 6
-
$553 USD
View
B+
Retailer 7
-
$668 USD
View
B
Retailer 8
-
$928 USD
View
B
Retailer 9
-
$990 USD
View
Most Expensive
B
MOH London
LG819612840 · Nov 5
$1,090 USD
£858 GBP
View
9 more retailers have this diamond
Prices start from $368 USDSave up to $722 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
1.27ct Round
$368 USD