CaratHunter
Plans
Round|Lab Grown|IGI

0.30ct I SI1 Round Lab Grown Diamond

VG • I/SI1 • IGI LGF1Q81770

Certificate IGI LGF1Q81770

Diamond specifications and retailer prices

From £231 GBP
$310 USD
As of October 28, 2026
Save £516 GBP (69%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £748 GBP at Diamond Exchange Canada · As of October 30, 2026
View at Diamond Exchange Canada

About this 0.3ct lab-grown round diamond

This 0.3ct lab-grown round sits in the sub-half-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LGF1Q81770 or F1Q81770. Listed at 5 retailers as of October 28, 2026, with prices from £231 to £748, a £516 spread on the same certified stone. Diamond Exchange Canada lists it at £748. 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
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LGF1Q81770
Dimensions4.21 × 4.24 × 2.76 mm
L/W Ratio1.01
Top View
4.21 mm4.24 mm0.30 ctI / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LGF1Q81770
Side View
Table 56.5%CrownGirdle: 0PavilionCulet: NoneDepth 65.3%

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 28
Current: £748 GBP|Low: £209 GBP|High: £748 GBP|Avg: £425 GBP
Diamond Exchange Canada
Retailer 2
Retailer 3
Retailer 4
October 30, 2026
Retailer 4£231 GBP
Retailer 2£327 GBP
Retailer 3£407 GBP
Diamond Exchange Canada£748 GBP

35 data points across 4 retailers

5 retailers£231 GBP to £748 GBP

B+
Cheapest Retailer
-
£231 GBP
$310 USD
B
Retailer 2
-
£327 GBP
View
B
Retailer 3
-
£407 GBP
€520 EUR
View
C
Retailer 4
-
£442 GBP
View
Most Expensive
C
Diamond Exchange Canada
1872603983 · Oct 30
£748 GBP
CA$1,392 CAD
View
4 more retailers have this diamond
Prices start from £231 GBPSave up to £516 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
£231 GBP