CaratHunter
Plans
Marquise|Lab Grown|IGI

1.21ct D IF Marquise Lab Grown Diamond

ID • D/IF • IGI LG850604471

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG850604471

Diamond specifications and retailer prices

From $484 AUD
As of November 4, 2026
Save $2,073 AUD (81%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $2,557 AUD at Brilliant Earth · As of November 6, 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 LG850604471 or 850604471. Listed at 17 retailers as of November 4, 2026, with prices from $484 to $2,557, a $2,073 spread on the same certified stone. Brilliant Earth lists it at $2,557. 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
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG850604471
Dimensions10.90 × 5.55 × 3.48 mm
L/W Ratio1.96
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
10.90 mm5.55 mm1.21 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG850604471
Side View
Table 61.0%Crown 36.1°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 62.7%

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: $974 AUD|Low: $581 AUD|High: $2,400 AUD|Avg: $1,375 AUD
Retailer 1
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
November 6, 2026
Retailer 12$581 AUD
Retailer 7$614 AUD
Retailer 14$694 AUD
Retailer 10$821 AUD
Retailer 3$850 AUD
Retailer 1$974 AUD
Retailer 9$1,066 AUD
Retailer 11$1,141 AUD
Retailer 6$1,369 AUD
Retailer 2$1,991 AUD
Retailer 4$2,017 AUD
Retailer 5$2,296 AUD
Retailer 8$2,338 AUD
Retailer 13$2,400 AUD

4 data points across 14 retailers

17 retailers$484 AUD to $2,557 AUD

A
Cheapest Retailer
-
$484 AUD
A
Retailer 2
-
$581 AUD
View
Final sale: no returns
A
Retailer 3
-
$614 AUD
View
A
Retailer 4
-
$694 AUD
View
A
Retailer 5
-
$821 AUD
View
A
Retailer 6
-
$850 AUD
View
A
Retailer 7
-
$974 AUD
View
B+
Retailer 8
-
$1,066 AUD
View
B+
Retailer 9
-
$1,141 AUD
View
B+
Retailer 10
-
$1,369 AUD
View
B
Retailer 11
-
$1,930 AUD
View
B
Retailer 12
-
$1,991 AUD
View
B
Retailer 13
-
$2,017 AUD
View
B
Retailer 14
-
$2,296 AUD
View
B
Retailer 15
-
$2,338 AUD
View
B
Retailer 16
-
$2,400 AUD
View
Most Expensive
B
Brilliant Earth
22500660A · Nov 6
$2,557 AUD
$1,790 USD
View
16 more retailers have this diamond
Prices start from $484 AUDSave up to $2,073 AUD

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
$484 AUD