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Round|Lab Grown|IGI

0.30ct G SI1 Round Lab Grown Diamond

VG • G/SI1 • IGI LG480170757

Shape and cutting style on the report: Round brilliant

Certificate IGI LG480170757

Diamond specifications and retailer prices

From £61 GBP
$82 USD
As of October 29, 2026
Save £273 GBP (82%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £563 GBP at MOH London · As of October 21, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG480170757 or 480170757. Listed at 10 retailers as of October 29, 2026, with a 447% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
G
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle36°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG480170757
Dimensions4.22 × 4.20 × 2.70 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
Faint Blue As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
4.22 mm4.20 mm0.30 ctG / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG480170757
Side View
Table 57.5%Crown 36°Girdle: STK-THKPavilion 40.9°Culet: NoneDepth 64.1%

Caratlytics Score

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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: Oct 29
Current: £563 GBP|Low: £59 GBP|High: £567 GBP|Avg: £172 GBP|+0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 3£61 GBP
Retailer 8£72 GBP
Retailer 4£81 GBP
Retailer 6£81 GBP
Retailer 2£136 GBP
Retailer 9£157 GBP
Retailer 5£166 GBP
Retailer 7£246 GBP
MOH London£563 GBP

42 data points across 9 retailers

10 retailers£61 GBP to £335 GBP

A
Cheapest Retailer
-
£61 GBP
$82 USD
B+
Retailer 2
-
£72 GBP
$96 USD
View
B+
Retailer 3
-
£81 GBP
$109 USD
View
B+
Retailer 4
-
£81 GBP
$109 USD
View
B+
Retailer 5
-
£136 GBP
View
B+
Retailer 6
-
£157 GBP
$210 USD
View
B+
Retailer 7
-
£166 GBP
$222 USD
View
B
Retailer 8
-
£246 GBP
$329 USD
View
B
Retailer 9
-
£335 GBP
View
Most Expensive
MOH London
LG480170757 · Oct 21
£563 GBP
View
Price last confirmed 9 days ago
9 more retailers have this diamond
Prices start from £61 GBPSave up to £273 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 Round
£61 GBP