CaratHunter
Plans
Marquise|Lab Grown|IGI

1.25ct D IF Marquise Lab Grown Diamond

ID • D/IF • IGI LG850604664

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG850604664

Diamond specifications and retailer prices

From $499 AUD
As of November 4, 2026
Save $2,501 AUD (83%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $3,000 AUD at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.25ct lab-grown marquise diamond

This 1.25ct lab-grown marquise sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG850604664 or 850604664. Listed at 17 retailers as of November 4, 2026, with prices from $499 to $3,000, a $2,501 spread on the same certified stone. Brilliant Earth lists it at $3,000. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.25
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG850604664
Dimensions11.01 × 5.64 × 3.55 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
11.01 mm5.64 mm1.25 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG850604664
Side View
Table 58.0%Crown 35.7°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 62.9%

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: $1,001 AUD|Low: $601 AUD|High: $2,386 AUD|Avg: $1,364 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 11$601 AUD
Retailer 7$633 AUD
Retailer 13$713 AUD
Retailer 9$836 AUD
Retailer 3$874 AUD
Retailer 1$1,001 AUD
Retailer 12$1,101 AUD
Retailer 10$1,211 AUD
Retailer 6$1,414 AUD
Retailer 14$1,508 AUD
Retailer 2$2,048 AUD
Retailer 4$2,077 AUD
Retailer 5$2,371 AUD
Retailer 8$2,386 AUD

4 data points across 14 retailers

17 retailers$499 AUD to $3,000 AUD

A
Cheapest Retailer
-
$499 AUD
A
Retailer 2
-
$601 AUD
View
Final sale: no returns
A
Retailer 3
-
$633 AUD
View
A
Retailer 4
-
$713 AUD
View
A
Retailer 5
-
$836 AUD
View
A
Retailer 6
-
$874 AUD
View
A
Retailer 7
-
$1,001 AUD
View
A
Retailer 8
-
$1,101 AUD
View
A
Retailer 9
-
$1,211 AUD
View
B+
Retailer 10
-
$1,414 AUD
View
B+
Retailer 11
-
$1,508 AUD
View
B+
Retailer 12
-
$1,988 AUD
View
B+
Retailer 13
-
$2,048 AUD
View
B+
Retailer 14
-
$2,077 AUD
View
B
Retailer 15
-
$2,371 AUD
View
B
Retailer 16
-
$2,386 AUD
View
Most Expensive
B
Brilliant Earth
22501119A · Nov 6
$3,000 AUD
$2,100 USD
View
16 more retailers have this diamond
Prices start from $499 AUDSave up to $2,501 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
1.25ct Marquise
$499 AUD