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Radiant|Lab Grown|IGI

1.28ct D VS1 Radiant Lab Grown Diamond

VG • D/VS1 • IGI LG823657854

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

Certificate IGI LG823657854

Diamond specifications and retailer prices

From $406 NZD
As of November 4, 2026
Save $1,818 NZD (82%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $2,224 NZD at Brilliant Earth · As of November 3, 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 very-good cut grade and certified by IGI LG823657854 or 823657854. Listed at 18 retailers as of November 3, 2026, with prices from $406 to $2,224, a $1,818 spread on the same certified stone. Brilliant Earth lists it at $2,224. 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
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.1°
Pavilion angle36.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG823657854
Dimensions7.58 × 5.38 × 3.67 mm
L/W Ratio1.41
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.58 mm5.38 mm1.28 ctD / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG823657854
Side View
Table 64.0%Crown 43.1°Girdle: MediumPavilion 36.1°Culet: NoneDepth 68.2%

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: $2,224 NZD|Low: $400 NZD|High: $2,224 NZD|Avg: $1,029 NZD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
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Retailer 17
Retailer 18
November 5, 2026
Retailer 16$406 NZD
Retailer 5$420 NZD
Retailer 9$445 NZD
Retailer 12$450 NZD
Retailer 2$596 NZD
Retailer 7$768 NZD
Retailer 8$768 NZD
Retailer 4$777 NZD
Retailer 13$818 NZD
Retailer 11$911 NZD
Retailer 10$1,019 NZD
Retailer 6$1,085 NZD
Retailer 15$1,446 NZD
Retailer 18$1,450 NZD
Retailer 17$1,541 NZD
Retailer 14$2,096 NZD
Retailer 3$2,144 NZD
Brilliant Earth$2,224 NZD

14 data points across 18 retailers

18 retailers$406 NZD to $2,224 NZD

A
Cheapest Retailer
-
$406 NZD
Final sale: no returns
A
Retailer 2
-
$420 NZD
View
Retailer 3
-
$445 NZD
View
Price last confirmed 12 days ago
A
Retailer 4
-
$450 NZD
View
A
Retailer 5
-
$596 NZD
View
A
Retailer 6
-
$768 NZD
View
A
Retailer 7
-
$768 NZD
View
A
Retailer 8
-
$777 NZD
View
A
Retailer 9
-
$818 NZD
View
B+
Retailer 10
-
$911 NZD
View
B+
Retailer 11
-
$1,019 NZD
View
B+
Retailer 12
-
$1,085 NZD
View
B
Retailer 13
-
$1,446 NZD
View
B
Retailer 14
-
$1,450 NZD
View
B
Retailer 15
-
$1,541 NZD
View
B
Retailer 16
-
$2,096 NZD
View
B
Retailer 17
-
$2,144 NZD
View
Most Expensive
B
Brilliant Earth
22257353A · Nov 3
$2,224 NZD
$1,250 USD
View
17 more retailers have this diamond
Prices start from $406 NZDSave up to $1,818 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
$406 NZD