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Round|Lab Grown|UNKNOWN

0.30ct H SI1 Round Lab Grown Diamond

GD • H/SI1 • UNKNOWN 302761675

Certificate UNKNOWN 302761675

Diamond specifications and retailer prices

From £102 GBP
$137 USD
As of October 29, 2026
Save £305 GBP (75%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £407 GBP at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

About this 0.3ct lab-grown round diamond

This 0.3ct lab-grown round sits in the sub-half-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by UNKNOWN 302761675. Listed at 5 retailers as of October 27, 2026, with prices from £102 to £407, a £305 spread on the same certified stone. NZ Jewellers lists it at £407. 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

0.30
Carat
H
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading LabUNKNOWN
CertificateUNKNOWN 302761675
Dimensions4.34 × 4.28 × 2.54 mm
L/W Ratio1.01
Top View
4.34 mm4.28 mm0.30 ctH / SI1
OriginLab Grown
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateUNKNOWN 302761675
Side View
Table 61.6%CrownGirdlePavilionCuletDepth 58.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £102 GBP|Low: £98 GBP|High: £237 GBP|Avg: £148 GBP|+4.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
October 10, 2026
Retailer 1£102 GBP
Retailer 4£119 GBP
Retailer 2£127 GBP
Retailer 3£237 GBP

4 data points across 4 retailers

5 retailers£102 GBP to £407 GBP

B+
Cheapest Retailer
-
£102 GBP
$137 USD
B+
Retailer 2
-
£119 GBP
$159 USD
View
B+
Retailer 3
-
£127 GBP
$170 USD
View
B
Retailer 4
-
£237 GBP
$317 USD
View
Most Expensive
C
NZ Jewellers
9a71a226-c614-4baa-8f97-d0ca4c7e38e9 · Oct 27
£407 GBP
$545 USD
View
4 more retailers have this diamond
Prices start from £102 GBPSave up to £305 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.

B+
0.30ct Round
£102 GBP