Radiant|Lab Grown|IGI

1.28ct D VS1 Radiant Lab Grown Diamond

VG • D/VS1 • IGI LG645498833

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

Certificate IGI LG645498833

Diamond specifications and retailer prices

From $251 USD
As of November 4, 2026
Save $1,104 USD (81%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $1,355 USD at Reve Diamonds · As of November 4, 2026
View at Reve 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 VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG645498833 or 645498833. Listed at 19 retailers as of November 4, 2026, with prices from $251 to $1,355, a $1,104 spread on the same certified stone. Reve Diamonds lists it at $1,355. 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
Color
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.7°
Pavilion angle36.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG645498833
Dimensions7.99 × 5.50 × 3.64 mm
L/W Ratio1.45
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.99 mm5.50 mm1.28 ctD / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG645498833
Side View
Table 73.0%Crown 42.7°Girdle: MediumPavilion 36.4°Culet: NoneDepth 66.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: $412 USD|Low: $241 USD|High: $1,261 USD|Avg: $643 USD|-1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 5, 2026
Retailer 12$251 USD
Retailer 2$311 USD
Retailer 1$412 USD
Retailer 10$470 USD
Retailer 4$522 USD
Retailer 7$536 USD
Retailer 5$586 USD
Retailer 6$761 USD
Retailer 9$850 USD
Retailer 11$955 USD
Retailer 3$999 USD
Retailer 8$1,245 USD

38 data points across 12 retailers

19 retailers$251 USD to $1,355 USD

A
Cheapest Retailer
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$251 USD
A
Retailer 2
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$280 USD
View
Final sale: no returns
A
Retailer 3
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$291 USD
View
A
Retailer 4
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$311 USD
View
Retailer 5
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$311 USD
View
Price last confirmed 12 days ago
A
Retailer 6
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$412 USD
View
A
Retailer 7
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$470 USD
View
B+
Retailer 8
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$522 USD
View
B+
Retailer 9
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$529 USD
View
B+
Retailer 10
-
$536 USD
View
B+
Retailer 11
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$565 USD
View
B+
Retailer 12
-
$586 USD
View
B+
Retailer 13
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$761 USD
View
B
Retailer 14
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$850 USD
View
B
Retailer 15
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$955 USD
View
B
Retailer 16
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$999 USD
View
B
Retailer 17
-
$1,050 USD
View
B
Retailer 18
-
$1,245 USD
View
Most Expensive
B
Reve Diamonds
66DCE0422 · Nov 4
$1,355 USD
View
18 more retailers have this diamond
Prices start from $251 USDSave up to $1,104 USD

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
$251 USD