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Round|Lab Grown|IGI

4.28ct D IF Round Lab Grown Diamond

ID • D/IF

Diamond specifications and retailer prices

From £9,783 GBP
$13,108 USD
As of October 29, 2026
1 retailer carries this diamond
Only listing: £9,783 GBP at Blue Nile
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Blue Nile

About this 4.28ct lab-grown round diamond

This 4.28ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI. Listed at a single retailer as of October 29, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

4.28
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions10.35 × 10.42 × 6.42 mm
L/W Ratio1.01
Top View
10.35 mm10.42 mm4.28 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 57.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 61.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 29
Current: £9,783 GBP|Low: £1,506 GBP|High: £17,016 GBP|Avg: £5,793 GBP|-42.5%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
September 26, 2026
Retailer 2£1,506 GBP
Retailer 4£3,662 GBP
Retailer 3£4,605 GBP
Blue Nile£9,783 GBP

2 data points across 4 retailers

1 retailer

B
Blue Nile
27621613 · Oct 29
£9,783 GBP
$13,108 USD
View

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
4.28ct Round
£9,783 GBP