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Oval|Lab Grown|UNKNOWN

0.30ct D SI1 Oval Lab Grown Diamond

ID • D/SI1 • UNKNOWN 40217751

Certificate UNKNOWN 40217751

Diamond specifications and retailer prices

From £129 GBP
$173 USD
As of October 29, 2026
Save £156 GBP (55%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £515 GBP at NZ Jewellers · As of October 31, 2026
View at NZ Jewellers

About this 0.3ct lab-grown oval diamond

This 0.3ct lab-grown oval sits in the sub-half-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by UNKNOWN 40217751. Listed at 5 retailers as of October 29, 2026, with a 121% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

0.30
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading LabUNKNOWN
CertificateUNKNOWN 40217751
Dimensions5.52 × 3.74 × 2.37 mm
L/W Ratio1.48
Top View
5.52 mm3.74 mm0.30 ctD / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateUNKNOWN 40217751
Side View
Table 62.1%CrownGirdlePavilionCuletDepth 63.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 29
Current: £129 GBP|Low: £124 GBP|High: £285 GBP|Avg: £191 GBP|+4.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
October 10, 2026
Retailer 1£129 GBP
Retailer 2£160 GBP
Retailer 4£160 GBP
Retailer 3£285 GBP

4 data points across 4 retailers

5 retailers£129 GBP to £285 GBP

A
Cheapest Retailer
-
£129 GBP
$173 USD
B+
Retailer 2
-
£150 GBP
$201 USD
View
B
Retailer 3
-
£160 GBP
$215 USD
View
C
Retailer 4
-
£285 GBP
$382 USD
View
Most Expensive
NZ Jewellers
b5a05799-94f3-45db-ba49-4b6eb5baee00 · Oct 31
£515 GBP
$690 USD
View
Price under review
4 more retailers have this diamond
Prices start from £129 GBPSave up to £156 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
0.30ct Oval
£129 GBP