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Radiant|Lab Grown|IGI

1.28ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG800678621

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

Certificate IGI LG800678621

Diamond specifications and retailer prices

From $955 NZD
HK$4,200 HKD
As of November 1, 2026
Save $4,945 NZD (84%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $5,901 NZD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG800678621 or 800678621. Listed at 13 retailers as of November 1, 2026, with prices from $955 to $5,901, a $4,945 spread on the same certified stone. Brilliant Earth lists it at $5,901. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.2°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG800678621
Dimensions8.14 × 5.39 × 3.46 mm
L/W Ratio1.51
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 mm5.39 mm1.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG800678621
Side View
Table 63.0%Crown 40.2°Girdle: MediumPavilion 33.9°Culet: NoneDepth 64.2%

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 1
Current: $5,901 NZD|Low: $955 NZD|High: $5,901 NZD|Avg: $2,155 NZD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 4$955 NZD
Retailer 12$1,169 NZD
Retailer 8$1,246 NZD
Retailer 6$1,334 NZD
Retailer 2$1,426 NZD
Retailer 5$1,495 NZD
Retailer 10$1,584 NZD
Retailer 9$1,902 NZD
Retailer 11$2,728 NZD
Retailer 3$3,190 NZD
Retailer 7$3,248 NZD
Brilliant Earth$5,901 NZD

44 data points across 12 retailers

13 retailers$955 NZD to $5,901 NZD

A
Cheapest Retailer
-
$955 NZD
HK$4,200 HKD
A
Retailer 2
-
$1,169 NZD
$658 USD
View
A
Retailer 3
-
$1,246 NZD
$701 USD
View
A
Retailer 4
-
$1,334 NZD
€715 EUR
View
A
Retailer 5
-
$1,426 NZD
ZAR 12,965 ZAR
View
B+
Retailer 6
-
$1,495 NZD
£662 GBP
View
A
Retailer 7
-
$1,584 NZD
$891 USD
View
B+
Retailer 8
-
$1,902 NZD
$1,070 USD
View
B+
Retailer 9
-
$2,728 NZD
$1,535 USD
View
B+
Retailer 10
-
$3,190 NZD
$1,795 USD
View
B+
Retailer 11
-
$3,248 NZD
£1,439 GBP
View
Retailer 12
-
$4,177 NZD
$2,350 USD
View
Price last confirmed 74 days ago
Most Expensive
B
Brilliant Earth
20634873A · Nov 2
$5,901 NZD
$3,320 USD
View
12 more retailers have this diamond
Prices start from $955 NZDSave up to $4,945 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
$955 NZD