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 $228 USD
As of November 4, 2026
Save $1,022 USD (82%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,250 USD 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 $228 to $1,250, a $1,022 spread on the same certified stone. Brilliant Earth lists it at $1,250. 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 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

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: $1,250 USD|Low: $225 USD|High: $1,250 USD|Avg: $578 USD
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
November 5, 2026
Retailer 16$228 USD
Retailer 5$236 USD
Retailer 9$250 USD
Retailer 12$253 USD
Retailer 2$335 USD
Retailer 7$432 USD
Retailer 8$432 USD
Retailer 4$437 USD
Retailer 13$460 USD
Retailer 11$512 USD
Retailer 10$573 USD
Retailer 6$610 USD
Retailer 15$813 USD
Retailer 18$815 USD
Retailer 17$866 USD
Retailer 14$1,178 USD
Retailer 3$1,205 USD
Brilliant Earth$1,250 USD

14 data points across 18 retailers

18 retailers$228 USD to $1,250 USD

A
Cheapest Retailer
-
$228 USD
Final sale: no returns
A
Retailer 2
-
$236 USD
View
Retailer 3
-
$250 USD
View
Price last confirmed 12 days ago
A
Retailer 4
-
$253 USD
View
A
Retailer 5
-
$335 USD
View
A
Retailer 6
-
$432 USD
View
A
Retailer 7
-
$432 USD
View
A
Retailer 8
-
$437 USD
View
A
Retailer 9
-
$460 USD
View
B+
Retailer 10
-
$512 USD
View
B+
Retailer 11
-
$573 USD
View
B+
Retailer 12
-
$610 USD
View
B
Retailer 13
-
$813 USD
View
B
Retailer 14
-
$815 USD
View
B
Retailer 15
-
$866 USD
View
B
Retailer 16
-
$1,178 USD
View
B
Retailer 17
-
$1,205 USD
View
Most Expensive
B
Brilliant Earth
22257353A · Nov 3
$1,250 USD
View
17 more retailers have this diamond
Prices start from $228 USDSave up to $1,022 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
$228 USD