CaratHunter
Plans
Marquise|Lab Grown|IGI

1.20ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG754594815

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG754594815

Diamond specifications and retailer prices

From $491 USD
As of October 30, 2026
Save $1,899 USD (79%) vs most expensive(unlock to see where)
30 retailers carry this diamond
Most expensive: $2,390 USD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.2ct lab-grown marquise diamond

This 1.2ct 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 LG754594815 or 754594815. Listed at 30 retailers as of October 30, 2026, with prices from $491 to $2,390, a $1,899 spread on the same certified stone. Brilliant Earth lists it at $2,390. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.20
Carat
D
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754594815
Dimensions11.03 × 5.46 × 3.45 mm
L/W Ratio2.02
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
11.03 mm5.46 mm1.20 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754594815
Side View
Table 58.0%Crown 36°Girdle: STK-THKPavilion 40°Culet: NoneDepth 63.2%

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: Oct 30
Current: $2,390 USD|Low: $456 USD|High: $2,640 USD|Avg: $1,234 USD|-9.5%
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
October 30, 2026
Retailer 15$456 USD
Retailer 21$491 USD
Retailer 14$545 USD
Retailer 20$615 USD
Retailer 4$627 USD
Retailer 9$770 USD
Retailer 5$771 USD
Retailer 8$823 USD
Retailer 17$874 USD
Retailer 13$900 USD
Retailer 19$936 USD
Retailer 7$1,267 USD
Retailer 16$1,327 USD
Retailer 3$1,464 USD
Retailer 22$1,525 USD
Retailer 6$1,784 USD
Retailer 2$1,788 USD
Retailer 11$1,820 USD
Retailer 10$1,957 USD
Retailer 18$2,012 USD
Retailer 12$2,125 USD
Brilliant Earth$2,390 USD

32 data points across 22 retailers

30 retailers$491 USD to $2,390 USD

Retailer 1
-
$456 USD
Price last confirmed 22 days ago
Retailer 2
-
$456 USD
View
Price last confirmed 31 days ago
A
Retailer 3
-
$491 USD
View
Final sale: no returns
Retailer 4
-
$511 USD
View
Price last confirmed 32 days ago
Retailer 5
-
$545 USD
View
Price last confirmed 22 days ago
Retailer 6
-
$545 USD
View
Price last confirmed 20 days ago
Retailer 7
-
$559 USD
View
Price last confirmed 32 days ago
A
Retailer 8
-
$615 USD
View
A
Retailer 9
-
$627 USD
HK$4,900 HKD
View
B+
Retailer 10
-
$770 USD
View
B+
Retailer 11
-
$771 USD
View
B+
Retailer 12
-
$823 USD
View
B+
Retailer 13
-
$874 USD
€832 EUR
View
Retailer 14
-
$893 USD
£703 GBP
View
Price last confirmed 15 days ago
B+
Retailer 15
-
$900 USD
£709 GBP
View
B+
Retailer 16
-
$936 USD
ZAR 15,122 ZAR
View
B
Retailer 17
-
$1,267 USD
View
B+
Retailer 18
-
$1,327 USD
A$2,042 AUD
View
B
Retailer 19
-
$1,464 USD
View
B+
Retailer 20
-
$1,525 USD
View
B
Retailer 21
-
$1,751 USD
View
Retailer 22
-
$1,751 USD
View
Price last confirmed 20 days ago
B
Retailer 23
-
$1,784 USD
View
B
Retailer 24
-
$1,788 USD
A$2,750 AUD
View
Retailer 25
-
$1,819 USD
View
Price last confirmed 30 days ago
B
Retailer 26
-
$1,820 USD
SGD 2,460 SGD
View
B
Retailer 27
-
$1,957 USD
View
B
Retailer 28
-
$2,012 USD
£1,584 GBP
View
B
Retailer 29
-
$2,125 USD
View
Most Expensive
B
Brilliant Earth
17981286A · Oct 30
$2,390 USD
View
29 more retailers have this diamond
Prices start from $491 USDSave up to $1,899 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
1.20ct Marquise
$491 USD