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Marquise|Lab Grown|IGI

1.20ct D IF Marquise Lab Grown Diamond

ID • D/IF • IGI LG731580885

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG731580885

Diamond specifications and retailer prices

From $491 USD
As of October 30, 2026
Save $1,634 USD (77%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: $2,125 USD at With Clarity · As of October 31, 2026
View at With Clarity

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 LG731580885 or 731580885. Listed at 29 retailers as of October 30, 2026, with prices from $491 to $2,125, a $1,634 spread on the same certified stone. With Clarity lists it at $2,125. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.6°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731580885
Dimensions10.81 × 5.53 × 3.51 mm
L/W Ratio1.95
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
10.81 mm5.53 mm1.20 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731580885
Side View
Table 61.0%Crown 37.6°Girdle: MED-STKPavilion 39.8°Culet: NoneDepth 63.5%

Caratlytics Score

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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: Oct 30
Current: $892 USD|Low: $270 USD|High: $2,125 USD|Avg: $1,185 USD|-4.2%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
With Clarity
October 31, 2026
Retailer 13$270 USD
Retailer 20$491 USD
Retailer 11$545 USD
Retailer 19$615 USD
Retailer 3$627 USD
Retailer 8$770 USD
Retailer 4$771 USD
Retailer 7$823 USD
Retailer 16$874 USD
Retailer 1$892 USD
Retailer 18$936 USD
Retailer 6$1,267 USD
Retailer 15$1,327 USD
Retailer 2$1,464 USD
Retailer 21$1,525 USD
Retailer 14$1,687 USD
Retailer 12$1,780 USD
Retailer 5$1,784 USD
Retailer 10$1,820 USD
Retailer 9$1,957 USD
Retailer 17$2,012 USD
With Clarity$2,125 USD

31 data points across 22 retailers

29 retailers$491 USD to $2,125 USD

Retailer 1
-
$270 USD
Price last confirmed 24 days ago
Retailer 2
-
$456 USD
View
Price last confirmed 32 days ago
A
Retailer 3
-
$491 USD
View
Final sale: no returns
Retailer 4
-
$511 USD
View
Price last confirmed 33 days ago
Retailer 5
-
$545 USD
View
Price last confirmed 24 days ago
Retailer 6
-
$545 USD
View
Price last confirmed 21 days ago
Retailer 7
-
$559 USD
View
Price last confirmed 33 days ago
A
Retailer 8
-
$615 USD
View
A
Retailer 9
-
$627 USD
HK$4,900 HKD
View
A
Retailer 10
-
$770 USD
View
A
Retailer 11
-
$771 USD
View
B+
Retailer 12
-
$823 USD
View
B+
Retailer 13
-
$874 USD
€832 EUR
View
B+
Retailer 14
-
$892 USD
£703 GBP
View
B+
Retailer 15
-
$936 USD
ZAR 15,122 ZAR
View
Retailer 16
-
$1,267 USD
View
Price last confirmed 8 days ago
B+
Retailer 17
-
$1,327 USD
A$2,042 AUD
View
B
Retailer 18
-
$1,464 USD
View
B+
Retailer 19
-
$1,525 USD
View
Retailer 20
-
$1,687 USD
A$2,596 AUD
View
Price last confirmed 24 days ago
B
Retailer 21
-
$1,751 USD
View
Retailer 22
-
$1,751 USD
View
Price last confirmed 22 days ago
B
Retailer 23
-
$1,780 USD
View
B
Retailer 24
-
$1,784 USD
View
Retailer 25
-
$1,819 USD
View
Price last confirmed 31 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
Most Expensive
B
With Clarity
731580885 · Oct 31
$2,125 USD
View
28 more retailers have this diamond
Prices start from $491 USDSave up to $1,634 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