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Radiant|Lab Grown|IGI

1.28ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG836617943

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

Certificate IGI LG836617943

Diamond specifications and retailer prices

From $376 NZD
As of November 4, 2026
Save $3,316 NZD (90%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $3,692 NZD at Helzberg Diamonds · As of November 4, 2026
View at Helzberg Diamonds

About this 1.28ct lab-grown radiant diamond

This 1.28ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG836617943 or 836617943. Listed at 20 retailers as of November 4, 2026, with prices from $376 to $3,692, a $3,316 spread on the same certified stone. Helzberg Diamonds lists it at $3,692. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.9°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836617943
Dimensions8.00 × 5.43 × 3.57 mm
L/W Ratio1.47
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
8.00 mm5.43 mm1.28 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836617943
Side View
Table 66.0%Crown 40.9°Girdle: MediumPavilion 35.1°Culet: NoneDepth 65.7%

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: Nov 4
Current: $3,692 NZD|Low: $376 NZD|High: $4,382 NZD|Avg: $1,385 NZD
Helzberg Diamonds
Retailer 2
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Retailer 21
November 5, 2026
Retailer 6$376 NZD
Retailer 11$420 NZD
Retailer 3$435 NZD
Retailer 4$465 NZD
Retailer 8$465 NZD
Retailer 21$481 NZD
Retailer 7$800 NZD
Retailer 17$802 NZD
Retailer 18$846 NZD
Retailer 2$852 NZD
Retailer 10$901 NZD
Retailer 15$1,137 NZD
Retailer 16$1,219 NZD
Retailer 5$1,481 NZD
Retailer 9$1,495 NZD
Retailer 12$1,590 NZD
Retailer 14$1,776 NZD
Retailer 13$1,861 NZD
Retailer 20$3,291 NZD
Retailer 19$3,317 NZD
Helzberg Diamonds$3,692 NZD

29 data points across 21 retailers

20 retailers$376 NZD to $3,692 NZD

A
Cheapest Retailer
-
$376 NZD
A
Retailer 2
-
$420 NZD
View
Final sale: no returns
A
Retailer 3
-
$435 NZD
View
A
Retailer 4
-
$465 NZD
View
Retailer 5
-
$465 NZD
View
Price last confirmed 11 days ago
A
Retailer 6
-
$800 NZD
View
A
Retailer 7
-
$802 NZD
View
A
Retailer 8
-
$846 NZD
View
A
Retailer 9
-
$852 NZD
View
A
Retailer 10
-
$901 NZD
View
A
Retailer 11
-
$1,137 NZD
View
A
Retailer 12
-
$1,219 NZD
View
B+
Retailer 13
-
$1,481 NZD
View
B+
Retailer 14
-
$1,495 NZD
View
B+
Retailer 15
-
$1,590 NZD
View
B+
Retailer 16
-
$1,760 NZD
View
B+
Retailer 17
-
$1,861 NZD
View
Retailer 18
-
$3,291 NZD
View
Price last confirmed 18 days ago
B
Retailer 19
-
$3,317 NZD
View
Most Expensive
B
Helzberg Diamonds
ZXZOJMMHNPKJ · Nov 4
$3,692 NZD
$2,081 USD
View
19 more retailers have this diamond
Prices start from $376 NZDSave up to $3,316 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
1.28ct Radiant
$376 NZD