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Round|Lab Grown|UNKNOWN

0.40ct F SI2 Round Lab Grown Diamond

EX • F/SI2 • UNKNOWN 4116071607

Certificate UNKNOWN 4116071607

Diamond specifications and retailer prices

From £147 GBP
$197 USD
As of November 1, 2026
Save £440 GBP (75%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £587 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.4ct lab-grown round diamond

This 0.4ct lab-grown round sits in the sub-half-carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by UNKNOWN 4116071607. Listed at 5 retailers as of October 30, 2026, with prices from £147 to £587, a £440 spread on the same certified stone. NZ Jewellers lists it at £587. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.40
Carat
F
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabUNKNOWN
CertificateUNKNOWN 4116071607
Dimensions4.81 × 4.79 × 2.86 mm
L/W Ratio1.00
Top View
4.81 mm4.79 mm0.40 ctF / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateUNKNOWN 4116071607
Side View
Table 55.1%CrownGirdlePavilionCuletDepth 59.6%

Caratlytics Score

How it works →
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 1
Current: £147 GBP|Low: £141 GBP|High: £318 GBP|Avg: £207 GBP|+4.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
October 10, 2026
Retailer 1£147 GBP
Retailer 4£171 GBP
Retailer 2£182 GBP
Retailer 3£318 GBP

4 data points across 4 retailers

5 retailers£147 GBP to £587 GBP

A
Cheapest Retailer
-
£147 GBP
$197 USD
B+
Retailer 2
-
£171 GBP
$229 USD
View
B+
Retailer 3
-
£182 GBP
$244 USD
View
B
Retailer 4
-
£318 GBP
$426 USD
View
Most Expensive
C
NZ Jewellers
d7767ad7-d60b-4e4f-bf5d-0b93a1c8e9a0 · Oct 30
£587 GBP
$786 USD
View
4 more retailers have this diamond
Prices start from £147 GBPSave up to £440 GBP

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
0.40ct Round
£147 GBP