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Marquise|Lab Grown|IGI

1.21ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG850604581

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG850604581

Diamond specifications and retailer prices

From $491 SGD
As of November 4, 2026
Save $2,027 SGD (81%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $2,517 SGD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.21ct lab-grown marquise diamond

This 1.21ct lab-grown marquise sits in the classic one-carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG850604581 or 850604581. Listed at 7 retailers as of November 4, 2026, with prices from $491 to $2,517, a $2,027 spread on the same certified stone. Brilliant Earth lists it at $2,517. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.9°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG850604581
Dimensions10.81 × 5.54 × 3.51 mm
L/W Ratio1.95
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
10.81 mm5.54 mm1.21 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG850604581
Side View
Table 60.0%Crown 36.9°Girdle: MED-STKPavilion 40°Culet: NoneDepth 63.4%

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 4
Current: $491 SGD|Low: $491 SGD|High: $1,597 SGD|Avg: $1,134 SGD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 4, 2026
Retailer 1$491 SGD
Retailer 3$603 SGD
Retailer 6$952 SGD
Retailer 4$1,440 SGD
Retailer 2$1,443 SGD
Retailer 5$1,597 SGD

2 data points across 6 retailers

7 retailers$491 SGD to $2,517 SGD

A
Cheapest Retailer
-
$491 SGD
A
Retailer 2
-
$603 SGD
View
B+
Retailer 3
-
$952 SGD
View
B+
Retailer 4
-
$1,440 SGD
View
B+
Retailer 5
-
$1,443 SGD
View
B
Retailer 6
-
$1,597 SGD
View
Most Expensive
D
Brilliant Earth
22500800A · Nov 4
$2,517 SGD
$1,970 USD
View
6 more retailers have this diamond
Prices start from $491 SGDSave up to $2,027 SGD

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 Marquise
$491 SGD