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Round|Lab Grown|GIA

0.30ct H VS1 Round Lab Grown Diamond

GD • H/VS1 • GIA 6312717350

Certificate GIA 6312717350

Diamond specifications and retailer prices

From £295 GBP
As of October 30, 2026
Save £142 GBP (32%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £437 GBP at MOH London · As of October 29, 2026
View at MOH London

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 VS1 clarity (very-slightly-included), with a standard cut grade and certified by GIA 6312717350. Listed at 3 retailers as of October 29, 2026, with prices from £295 to £437, a £142 spread on the same certified stone. MOH London lists it at £437. 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
VS1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading LabGIA
CertificateGIA 6312717350
Dimensions4.35 × 4.28 × 2.57 mm
L/W Ratio1.02
Top View
4.35 mm4.28 mm0.30 ctH / VS1
OriginLab Grown
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6312717350
Side View
Table 66.0%CrownGirdlePavilionCulet: NoneDepth 59.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £437 GBP|Low: £239 GBP|High: £474 GBP|Avg: £360 GBP|-6.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
October 30, 2026
Retailer 3£295 GBP
Retailer 2£308 GBP
Retailer 4£380 GBP
MOH London£437 GBP

43 data points across 4 retailers

3 retailers£295 GBP to £437 GBP

B
Cheapest Retailer
-
£295 GBP
B
Retailer 2
-
£308 GBP
€390 EUR
View
Most Expensive
B
MOH London
222DC6413 · Oct 29
£437 GBP
View
2 more retailers have this diamond
Prices start from £295 GBPSave up to £142 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
£295 GBP