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Round|Lab Grown|IGI

1.30ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG644481659

Certificate IGI LG644481659

Diamond specifications and retailer prices

From £456 GBP
As of November 6, 2026
Save £183 GBP (29%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £639 GBP at Zales · As of November 6, 2026
View at Zales

About this 1.3ct lab-grown round diamond

This 1.3ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG644481659 or 644481659. Listed at 3 retailers as of November 6, 2026, with prices from £456 to £639, a £183 spread on the same certified stone. Zales lists it at £639. 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

1.30
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG644481659
Dimensions6.97 × 6.99 mm
L/W Ratio1.00
Top View
6.97 mm6.99 mm1.30 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG644481659
Side View
Table 57.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.1%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: £456 GBP|Low: £456 GBP|High: £1,077 GBP|Avg: £795 GBP|-57.7%
Retailer 1
Retailer 2
Zales
November 6, 2026
Retailer 1£456 GBP
Retailer 2£639 GBP
Zales£639 GBP

10 data points across 3 retailers

3 retailers£456 GBP to £639 GBP

B+
Cheapest Retailer
-
£456 GBP
B
Retailer 2
-
£639 GBP
View
Most Expensive
B
Zales
521383532 · Nov 6
£639 GBP
$860 USD
View
2 more retailers have this diamond
Prices start from £456 GBPSave up to £183 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+
1.30ct Round
£456 GBP