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Radiant|Lab Grown|IGI

1.28ct D FL Radiant Lab Grown Diamond

VG • D/FL • IGI LG815697866

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

Certificate IGI LG815697866

Diamond specifications and retailer prices

From $598 NZD
£265 GBP
As of November 2, 2026
Save $3,472 NZD (85%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $5,172 NZD at Rare Carat · As of October 21, 2026
View at Rare Carat

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 very-good cut grade and certified by IGI LG815697866 or 815697866. Listed at 9 retailers as of November 2, 2026, with a 580% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.28
Carat
D
Colour
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46°
Pavilion angle36.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG815697866
Dimensions7.50 × 5.23 × 3.65 mm
L/W Ratio1.43
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
7.50 mm5.23 mm1.28 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG815697866
Side View
Table 70.0%Crown 46°Girdle: MED-STKPavilion 36.8°Culet: NoneDepth 69.8%

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 2
Current: $5,172 NZD|Low: $482 NZD|High: $5,847 NZD|Avg: $2,040 NZD|+23.9%
Rare Carat
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
November 2, 2026
Retailer 5$482 NZD
Retailer 6$544 NZD
Retailer 2$598 NZD
Retailer 14$887 NZD
Retailer 3$1,214 NZD
Retailer 7$1,366 NZD
Retailer 4$1,398 NZD
Retailer 17$1,484 NZD
Retailer 8$1,591 NZD
Retailer 13$1,699 NZD
Retailer 16$1,706 NZD
Retailer 15$1,955 NZD
Retailer 11$2,343 NZD
Retailer 9$2,786 NZD
Retailer 10$3,572 NZD
Retailer 12$4,070 NZD
Rare Carat$5,172 NZD

21 data points across 17 retailers

9 retailers$598 NZD to $4,070 NZD

A
Cheapest Retailer
-
$598 NZD
£265 GBP
A
Retailer 2
-
$887 NZD
$499 USD
View
B+
Retailer 3
-
$1,699 NZD
$956 USD
View
Retailer 4
-
$1,706 NZD
$960 USD
View
Price last confirmed 10 days ago
B+
Retailer 5
-
$1,955 NZD
$1,100 USD
View
B+
Retailer 6
-
$2,343 NZD
£1,038 GBP
View
B
Retailer 7
-
$3,572 NZD
$2,010 USD
View
B
Retailer 8
-
$4,070 NZD
$2,290 USD
View
Most Expensive
Rare Carat
PE1710_l_831604041 · Oct 21
$5,172 NZD
$2,910 USD
View
Price last confirmed 12 days ago
8 more retailers have this diamond
Prices start from $598 NZDSave up to $3,472 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
$598 NZD