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Radiant|Lab Grown|IGI

1.18ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG729590710

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG729590710

Diamond specifications and retailer prices

From $349 NZD
As of November 4, 2026
Save $2,613 NZD (88%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $2,963 NZD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.18ct lab-grown radiant diamond

This 1.18ct lab-grown radiant 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 LG729590710 or 729590710. Listed at 21 retailers as of November 4, 2026, with prices from $349 to $2,963, a $2,613 spread on the same certified stone. Brilliant Earth lists it at $2,963. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.18
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.4°
Pavilion angle37.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG729590710
Dimensions10.37 × 7.13 × 4.39 mm
L/W Ratio1.45
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
10.37 mm7.13 mm1.18 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG729590710
Side View
Table 65.0%Crown 47.4°Girdle: Slightly ThickPavilion 37.3°Culet: NoneDepth 72.1%

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 4
Current: $2,963 NZD|Low: $335 NZD|High: $4,932 NZD|Avg: $1,155 NZD|-39.9%
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
November 5, 2026
Retailer 4$349 NZD
Retailer 18$390 NZD
Retailer 10$406 NZD
Retailer 5$435 NZD
Retailer 12$435 NZD
Retailer 17$726 NZD
Retailer 15$749 NZD
Retailer 7$756 NZD
Retailer 2$784 NZD
Retailer 9$866 NZD
Retailer 14$1,057 NZD
Retailer 13$1,123 NZD
Retailer 8$1,272 NZD
Retailer 6$1,394 NZD
Retailer 11$1,488 NZD
Retailer 20$1,536 NZD
Retailer 3$1,637 NZD
Retailer 16$2,028 NZD
Retailer 19$2,422 NZD
Brilliant Earth$2,963 NZD

44 data points across 20 retailers

21 retailers$349 NZD to $2,963 NZD

A
Cheapest Retailer
-
$349 NZD
A
Retailer 2
-
$390 NZD
View
Final sale: no returns
A
Retailer 3
-
$406 NZD
View
A
Retailer 4
-
$435 NZD
View
Retailer 5
-
$435 NZD
View
Price last confirmed 11 days ago
A
Retailer 6
-
$726 NZD
View
A
Retailer 7
-
$749 NZD
View
A
Retailer 8
-
$756 NZD
View
A
Retailer 9
-
$784 NZD
View
A
Retailer 10
-
$866 NZD
View
A
Retailer 11
-
$1,057 NZD
View
A
Retailer 12
-
$1,123 NZD
View
B+
Retailer 13
-
$1,272 NZD
View
B+
Retailer 14
-
$1,394 NZD
View
B+
Retailer 15
-
$1,488 NZD
View
B+
Retailer 16
-
$1,536 NZD
View
B+
Retailer 17
-
$1,621 NZD
View
B+
Retailer 18
-
$2,028 NZD
View
Retailer 19
-
$2,422 NZD
View
Price last confirmed 15 days ago
Retailer 20
-
$2,883 NZD
View
Most Expensive
B
Brilliant Earth
21417298A · Nov 4
$2,963 NZD
$1,670 USD
View
20 more retailers have this diamond
Prices start from $349 NZDSave up to $2,613 NZD

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
1.18ct Radiant
$349 NZD