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Radiant|Lab Grown|IGI

1.55ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG728538606

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

Certificate IGI LG728538606

Diamond specifications and retailer prices

From $506 NZD
As of November 4, 2026
Save $4,657 NZD (90%) vs most expensive(unlock to see where)
30 retailers carry this diamond
Most expensive: $5,162 NZD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.55ct lab-grown radiant diamond

This 1.55ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG728538606 or 728538606. Listed at 30 retailers as of November 4, 2026, with prices from $506 to $5,162, a $4,657 spread on the same certified stone. Brilliant Earth lists it at $5,162. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.4°
Pavilion angle34.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG728538606
Dimensions8.14 × 5.88 × 3.88 mm
L/W Ratio1.38
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
8.14 mm5.88 mm1.55 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG728538606
Side View
Table 64.0%Crown 39.4°Girdle: MediumPavilion 34.6°Culet: NoneDepth 66.0%

Caratlytics Score

How it works →
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: $5,162 NZD|Low: $506 NZD|High: $5,943 NZD|Avg: $2,160 NZD|-13.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
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Retailer 7
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Retailer 23
November 5, 2026
Retailer 22$506 NZD
Retailer 13$566 NZD
Retailer 20$905 NZD
Retailer 21$930 NZD
Retailer 3$976 NZD
Retailer 16$1,118 NZD
Retailer 8$1,128 NZD
Retailer 18$1,222 NZD
Retailer 12$1,244 NZD
Retailer 2$1,464 NZD
Retailer 10$1,559 NZD
Retailer 7$1,627 NZD
Retailer 4$1,928 NZD
Retailer 23$2,228 NZD
Retailer 9$2,413 NZD
Retailer 11$2,516 NZD
Retailer 5$2,594 NZD
Retailer 6$2,681 NZD
Retailer 19$2,767 NZD
Retailer 15$3,005 NZD
Retailer 14$4,355 NZD
Retailer 17$4,488 NZD
Brilliant Earth$5,162 NZD

35 data points across 23 retailers

30 retailers$506 NZD to $5,162 NZD

A
Cheapest Retailer
-
$506 NZD
Retailer 2
-
$527 NZD
View
Price last confirmed 28 days ago
Retailer 3
-
$561 NZD
View
Price last confirmed 36 days ago
A
Retailer 4
-
$566 NZD
View
Final sale: no returns
Retailer 5
-
$651 NZD
View
Price last confirmed 39 days ago
Retailer 6
-
$655 NZD
View
Price last confirmed 33 days ago
Retailer 7
-
$687 NZD
View
Price last confirmed 37 days ago
A
Retailer 8
-
$905 NZD
View
A
Retailer 9
-
$930 NZD
View
A
Retailer 10
-
$976 NZD
View
A
Retailer 11
-
$1,118 NZD
View
A
Retailer 12
-
$1,128 NZD
View
A
Retailer 13
-
$1,222 NZD
View
A
Retailer 14
-
$1,244 NZD
View
A
Retailer 15
-
$1,464 NZD
View
A
Retailer 16
-
$1,559 NZD
View
A
Retailer 17
-
$1,627 NZD
View
B+
Retailer 18
-
$1,928 NZD
View
B+
Retailer 19
-
$2,228 NZD
View
Retailer 20
-
$2,320 NZD
View
Price last confirmed 26 days ago
B+
Retailer 21
-
$2,413 NZD
View
Retailer 22
-
$2,468 NZD
View
Price last confirmed 36 days ago
B+
Retailer 23
-
$2,516 NZD
View
B+
Retailer 24
-
$2,594 NZD
View
B+
Retailer 25
-
$2,681 NZD
View
B+
Retailer 26
-
$2,767 NZD
View
Retailer 27
-
$3,005 NZD
View
Price last confirmed 31 days ago
Retailer 28
-
$4,355 NZD
View
Price last confirmed 8 days ago
B
Retailer 29
-
$4,488 NZD
View
Most Expensive
B
Brilliant Earth
16223266Y · Nov 4
$5,162 NZD
$2,910 USD
View
29 more retailers have this diamond
Prices start from $506 NZDSave up to $4,657 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
1.55ct Radiant
$506 NZD