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Radiant|Lab Grown|IGI

1.28ct D VS1 Radiant Lab Grown Diamond

GD • D/VS1 • IGI LG838638688

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

Certificate IGI LG838638688

Diamond specifications and retailer prices

From $363 NZD
As of November 4, 2026
Save $1,781 NZD (83%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $2,241 NZD at Brilliant Earth · As of October 23, 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 VS1 clarity (very-slightly-included), with a standard cut grade and certified by IGI LG838638688 or 838638688. Listed at 20 retailers as of November 4, 2026, with a 491% 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
VS1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.3°
Pavilion angle35.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG838638688
Dimensions7.82 × 5.32 × 3.62 mm
L/W Ratio1.47
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.82 mm5.32 mm1.28 ctD / VS1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG838638688
Side View
Table 65.0%Crown 43.3°Girdle: MediumPavilion 35.9°Culet: NoneDepth 68.0%

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: $2,241 NZD|Low: $359 NZD|High: $2,241 NZD|Avg: $1,063 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
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 5, 2026
Retailer 17$363 NZD
Retailer 19$406 NZD
Retailer 6$420 NZD
Retailer 10$445 NZD
Retailer 14$450 NZD
Retailer 2$596 NZD
Retailer 8$768 NZD
Retailer 9$768 NZD
Retailer 5$777 NZD
Retailer 15$818 NZD
Retailer 13$911 NZD
Retailer 12$1,019 NZD
Retailer 7$1,085 NZD
Retailer 11$1,281 NZD
Retailer 18$1,446 NZD
Retailer 3$1,450 NZD
Retailer 20$1,541 NZD
Retailer 16$2,096 NZD
Retailer 4$2,144 NZD
Brilliant Earth$2,241 NZD

28 data points across 20 retailers

20 retailers$363 NZD to $2,144 NZD

A
Cheapest Retailer
-
$363 NZD
A
Retailer 2
-
$406 NZD
View
Final sale: no returns
A
Retailer 3
-
$420 NZD
View
Retailer 4
-
$445 NZD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$450 NZD
View
A
Retailer 6
-
$596 NZD
View
B+
Retailer 7
-
$768 NZD
View
A
Retailer 8
-
$768 NZD
View
B+
Retailer 9
-
$777 NZD
View
B+
Retailer 10
-
$818 NZD
View
B+
Retailer 11
-
$911 NZD
View
B+
Retailer 12
-
$1,019 NZD
View
B+
Retailer 13
-
$1,085 NZD
View
Retailer 14
-
$1,281 NZD
View
Price last confirmed 18 days ago
B
Retailer 15
-
$1,446 NZD
View
B
Retailer 16
-
$1,450 NZD
View
B
Retailer 17
-
$1,541 NZD
View
B
Retailer 18
-
$2,096 NZD
View
B
Retailer 19
-
$2,144 NZD
View
Most Expensive
Brilliant Earth
21756598A · Oct 23
$2,241 NZD
$1,260 USD
View
Price last confirmed 13 days ago
19 more retailers have this diamond
Prices start from $363 NZDSave up to $1,781 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
$363 NZD