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 $204 USD
As of November 4, 2026
Save $1,001 USD (83%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $1,260 USD 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
Color
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

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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: $1,260 USD|Low: $202 USD|High: $1,260 USD|Avg: $597 USD
Brilliant Earth
Retailer 2
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Retailer 5
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Retailer 7
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Retailer 11
Retailer 12
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Retailer 17
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Retailer 19
Retailer 20
November 5, 2026
Retailer 17$204 USD
Retailer 19$228 USD
Retailer 6$236 USD
Retailer 10$250 USD
Retailer 14$253 USD
Retailer 2$335 USD
Retailer 8$432 USD
Retailer 9$432 USD
Retailer 5$437 USD
Retailer 15$460 USD
Retailer 13$512 USD
Retailer 12$573 USD
Retailer 7$610 USD
Retailer 11$720 USD
Retailer 18$813 USD
Retailer 3$815 USD
Retailer 20$866 USD
Retailer 16$1,178 USD
Retailer 4$1,205 USD
Brilliant Earth$1,260 USD

28 data points across 20 retailers

20 retailers$204 USD to $1,205 USD

A
Cheapest Retailer
-
$204 USD
A
Retailer 2
-
$228 USD
View
Final sale: no returns
A
Retailer 3
-
$236 USD
View
Retailer 4
-
$250 USD
View
Price last confirmed 12 days ago
A
Retailer 5
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$253 USD
View
A
Retailer 6
-
$335 USD
View
B+
Retailer 7
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$432 USD
View
A
Retailer 8
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$432 USD
View
B+
Retailer 9
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$437 USD
View
B+
Retailer 10
-
$460 USD
View
B+
Retailer 11
-
$512 USD
View
B+
Retailer 12
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$573 USD
View
B+
Retailer 13
-
$610 USD
View
Retailer 14
-
$720 USD
View
Price last confirmed 18 days ago
B
Retailer 15
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$813 USD
View
B
Retailer 16
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$815 USD
View
B
Retailer 17
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$866 USD
View
B
Retailer 18
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$1,178 USD
View
B
Retailer 19
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$1,205 USD
View
Most Expensive
Brilliant Earth
21756598A · Oct 23
$1,260 USD
View
Price last confirmed 13 days ago
19 more retailers have this diamond
Prices start from $204 USDSave up to $1,001 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
$204 USD