CaratHunter
Plans
Marquise|Lab Grown|IGI

1.21ct D IF Marquise Lab Grown Diamond

ID • D/IF • IGI LG739586856

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG739586856

Diamond specifications and retailer prices

From $441 USD
As of November 4, 2026
Save $2,089 USD (83%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $2,530 USD 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 D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG739586856 or 739586856. Listed at 23 retailers as of November 4, 2026, with prices from $441 to $2,530, a $2,089 spread on the same certified stone. Brilliant Earth lists it at $2,530. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG739586856
Dimensions10.79 × 5.59 × 3.49 mm
L/W Ratio1.93
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
10.79 mm5.59 mm1.21 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG739586856
Side View
Table 59.0%Crown 33.3°Girdle: MediumPavilion 40°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $2,530 USD|Low: $441 USD|High: $2,960 USD|Avg: $1,212 USD|-14.5%
Brilliant Earth
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
Retailer 23
November 5, 2026
Retailer 16$441 USD
Retailer 11$493 USD
Retailer 7$494 USD
Retailer 5$547 USD
Retailer 23$547 USD
Retailer 6$601 USD
Retailer 19$690 USD
Retailer 10$773 USD
Retailer 4$835 USD
Retailer 12$859 USD
Retailer 20$867 USD
Retailer 2$894 USD
Retailer 17$942 USD
Retailer 18$1,331 USD
Retailer 3$1,469 USD
Retailer 21$1,535 USD
Retailer 9$1,600 USD
Retailer 15$1,733 USD
Retailer 22$1,757 USD
Retailer 8$1,790 USD
Retailer 14$1,961 USD
Retailer 13$2,007 USD
Brilliant Earth$2,530 USD

40 data points across 23 retailers

23 retailers$441 USD to $2,530 USD

A
Cheapest Retailer
-
$441 USD
A
Retailer 2
-
$493 USD
View
Final sale: no returns
A
Retailer 3
-
$494 USD
View
Retailer 4
-
$547 USD
View
Price last confirmed 11 days ago
A
Retailer 5
-
$547 USD
View
A
Retailer 6
-
$601 USD
View
A
Retailer 7
-
$690 USD
View
B+
Retailer 8
-
$773 USD
View
B+
Retailer 9
-
$835 USD
View
B+
Retailer 10
-
$859 USD
View
Retailer 11
-
$867 USD
View
Price last confirmed 9 days ago
B+
Retailer 12
-
$894 USD
View
B+
Retailer 13
-
$942 USD
View
B+
Retailer 14
-
$1,331 USD
View
B
Retailer 15
-
$1,469 USD
View
Retailer 16
-
$1,535 USD
View
Price last confirmed 8 days ago
B
Retailer 17
-
$1,600 USD
View
B
Retailer 18
-
$1,733 USD
View
B
Retailer 19
-
$1,757 USD
View
B
Retailer 20
-
$1,790 USD
View
B
Retailer 21
-
$1,961 USD
View
B
Retailer 22
-
$2,007 USD
View
Most Expensive
B
Brilliant Earth
19056215A · Nov 4
$2,530 USD
View
22 more retailers have this diamond
Prices start from $441 USDSave up to $2,089 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 Marquise
$441 USD