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Radiant|Lab Grown|IGI

4.05ct E SI2 Radiant Lab Grown Diamond

VG • E/SI2 • IGI LG851625454

Certificate IGI LG851625454

Diamond specifications and retailer prices

From $1,672 NZD
$939 USD
As of October 30, 2026
Save $113 NZD (6%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $1,785 NZD at 77 Diamonds · As of October 30, 2026
View at 77 Diamonds

About this 4.05ct lab-grown radiant diamond

This 4.05ct lab-grown radiant sits in the three to five carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI LG851625454 or 851625454. Listed at 2 retailers as of October 30, 2026, with a relatively tight 7% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

4.05
Carat
E
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
Polish
Symmetry
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG851625454
Dimensions11.35 × 7.54 × 5.13 mm
L/W Ratio1.51
Top View
11.35 mm7.54 mm4.05 ctE / SI2
OriginLab Grown
CutVery Good
FluorescenceNone
CertificateIGI LG851625454
Side View
Table 63.0%CrownGirdlePavilionCuletDepth 68.0%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 30
Current: $1,785 NZD|Low: $1,672 NZD|High: $1,785 NZD|Avg: $1,728 NZD
77 Diamonds
Retailer 2
October 30, 2026
Retailer 2$1,672 NZD
77 Diamonds$1,785 NZD

1 data point across 2 retailers

2 retailers$1,672 NZD to $1,785 NZD

B
Cheapest Retailer
-
$1,672 NZD
$939 USD
Most Expensive
B
77 Diamonds
RADPUIFSYAQCKZEB · Oct 30
$1,785 NZD
£789 GBP
View
1 more retailer has this diamond
Prices start from $1,672 NZDSave up to $113 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.

B
4.05ct Radiant
$1,672 NZD