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Oval|Lab Grown|IGI

1.21ct D SI1 Oval Lab Grown Diamond

ID • D/SI1 • IGI LG754518704

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG754518704

Diamond specifications and retailer prices

From $426 USD
As of November 6, 2026
Save $660 USD (61%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,086 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.21ct lab-grown oval diamond

This 1.21ct lab-grown oval sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG754518704 or 754518704. Listed at 5 retailers as of November 1, 2026, with prices from $426 to $1,086, a $660 spread on the same certified stone. MOH London lists it at $1,086. 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

1.21
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754518704
Dimensions8.35 × 6.06 × 3.79 mm
L/W Ratio1.38
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
8.35 mm6.06 mm1.21 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754518704
Side View
Table 61.0%Crown 35.9°Girdle: THN-MEDPavilion 40.7°Culet: NoneDepth 62.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: $1,086 USD|Low: $386 USD|High: $1,110 USD|Avg: $608 USD|-2.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 3$426 USD
Retailer 4$445 USD
Retailer 2$449 USD
Retailer 5$635 USD
MOH London$1,086 USD

43 data points across 5 retailers

5 retailers$426 USD to $1,086 USD

A
Cheapest Retailer
-
$426 USD
A
Retailer 2
-
$445 USD
View
A
Retailer 3
-
$449 USD
View
B+
Retailer 4
-
$635 USD
View
Most Expensive
B
MOH London
LG754518704 · Nov 1
$1,086 USD
£855 GBP
View
4 more retailers have this diamond
Prices start from $426 USDSave up to $660 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
1.21ct Oval
$426 USD