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Radiant|Lab Grown|IGI

6.28ct E VS1 Radiant Lab Grown Diamond

EX • E/VS1 • IGI LG837629858

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

Certificate IGI LG837629858

Diamond specifications and retailer prices

From $1,952 NZD
$1,100 USD
As of October 30, 2026
Save $1,022 NZD (34%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $25,639 NZD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 6.28ct lab-grown radiant diamond

This 6.28ct lab-grown radiant sits in the over five carat band, graded E colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG837629858 or 837629858. Listed at 4 retailers as of October 30, 2026, with a 52% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

6.28
Carat
E
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.3°
Pavilion angle36.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837629858
Dimensions12.52 × 9.24 × 6.31 mm
L/W Ratio1.35
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.52 mm9.24 mm6.28 ctE / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837629858
Side View
Table 67.0%Crown 45.3°Girdle: Slightly ThickPavilion 36.2°Culet: NoneDepth 68.3%

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: Oct 30
Current: $25,639 NZD|Low: $1,952 NZD|High: $25,639 NZD|Avg: $11,647 NZD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
October 30, 2026
Retailer 2$1,952 NZD
Retailer 3$2,973 NZD
Retailer 4$10,495 NZD
Brilliant Earth$25,639 NZD

33 data points across 4 retailers

4 retailers$1,952 NZD to $2,973 NZD

A
Cheapest Retailer
-
$1,952 NZD
$1,100 USD
Final sale: no returns
A
Retailer 2
-
$2,973 NZD
£1,320 GBP
View
Retailer 3
-
$10,495 NZD
$5,915 USD
View
Price last confirmed 16 days ago
Most Expensive
Brilliant Earth
21429997A · Oct 28
$25,639 NZD
$14,450 USD
View
Price under review
3 more retailers have this diamond
Prices start from $1,952 NZDSave up to $1,022 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
6.28ct Radiant
$1,952 NZD