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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 $577 AUD
As of November 6, 2026
Save $1,966 AUD (77%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: $2,598 AUD at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

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 November 6, 2026, with a 341% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Colour
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: Nov 6
Current: $1,916 AUD|Low: $386 AUD|High: $3,036 AUD|Avg: $1,642 AUD
NZ Jewellers
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 6, 2026
Retailer 15$386 AUD
Retailer 13$577 AUD
Retailer 21$694 AUD
Retailer 14$779 AUD
Retailer 20$779 AUD
Retailer 3$843 AUD
Retailer 2$966 AUD
Retailer 18$1,051 AUD
Retailer 12$1,101 AUD
Retailer 17$1,126 AUD
Retailer 9$1,341 AUD
Retailer 7$1,357 AUD
Retailer 22$1,464 AUD
Retailer 23$1,748 AUD
NZ Jewellers$1,916 AUD
Retailer 8$1,977 AUD
Retailer 5$2,001 AUD
Retailer 11$2,178 AUD
Retailer 6$2,277 AUD
Retailer 4$2,327 AUD
Retailer 19$2,381 AUD
Retailer 16$2,410 AUD
Retailer 10$2,543 AUD

29 data points across 23 retailers

29 retailers$577 AUD to $2,543 AUD

Retailer 1
-
$386 AUD
Price last confirmed 29 days ago
A
Retailer 2
-
$577 AUD
View
Final sale: no returns
Retailer 3
-
$651 AUD
View
Price last confirmed 37 days ago
A
Retailer 4
-
$694 AUD
View
Retailer 5
-
$730 AUD
View
Price last confirmed 38 days ago
A
Retailer 6
-
$779 AUD
View
Retailer 7
-
$779 AUD
View
Price last confirmed 29 days ago
Retailer 8
-
$779 AUD
View
Price last confirmed 27 days ago
Retailer 9
-
$799 AUD
View
Price last confirmed 38 days ago
A
Retailer 10
-
$843 AUD
View
B+
Retailer 11
-
$966 AUD
View
A
Retailer 12
-
$1,051 AUD
View
B+
Retailer 13
-
$1,101 AUD
View
B+
Retailer 14
-
$1,126 AUD
View
B
Retailer 15
-
$1,341 AUD
View
B+
Retailer 16
-
$1,357 AUD
View
B+
Retailer 17
-
$1,464 AUD
View
B+
Retailer 18
-
$1,748 AUD
View
B+
Retailer 19
-
$1,916 AUD
View
B
Retailer 20
-
$1,977 AUD
View
B
Retailer 21
-
$2,001 AUD
View
Retailer 22
-
$2,178 AUD
View
Price last confirmed 9 days ago
B
Retailer 23
-
$2,277 AUD
View
B
Retailer 24
-
$2,327 AUD
View
B
Retailer 25
-
$2,381 AUD
View
Retailer 26
-
$2,410 AUD
View
Price last confirmed 29 days ago
Retailer 27
-
$2,501 AUD
View
Price last confirmed 27 days ago
B
Retailer 28
-
$2,543 AUD
View
Most Expensive
NZ Jewellers
e4b2b041-3e56-4070-9a49-52da5d7f8576 · Sep 30
$2,598 AUD
$1,819 USD
View
Price last confirmed 36 days ago
28 more retailers have this diamond
Prices start from $577 AUDSave up to $1,966 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
1.20ct Marquise
$577 AUD