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3.51ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG626476207

Shape and cutting style on the report: Round brilliant

Certificate IGI LG626476207

Diamond specifications and retailer prices

From £2,079 GBP
CA$3,870 CAD
As of October 30, 2026
Save £1,588 GBP (43%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £3,667 GBP at The Diamond Guys · As of October 30, 2026
View at The Diamond Guys

About this 3.51ct lab-grown round diamond

This 3.51ct lab-grown round sits in the three to five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG626476207 or 626476207. Listed at 2 retailers as of October 30, 2026, with prices from £2,079 to £3,667, a £1,588 spread on the same certified stone. The Diamond Guys lists it at £3,667. 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

3.51
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG626476207
Dimensions9.72 × 9.66 × 5.99 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.72 mm9.66 mm3.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG626476207
Side View
Table 58.0%Crown 35.1°Girdle: MediumPavilion 40.8°Culet: NoneDepth 61.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 30
Current: £2,079 GBP|Low: £881 GBP|High: £5,732 GBP|Avg: £2,375 GBP|+32.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
The Diamond Guys
June 15, 2026
Retailer 3£1,296 GBP
Retailer 6£1,336 GBP
Retailer 2£1,376 GBP
Retailer 5£1,492 GBP
Retailer 4£1,667 GBP
Retailer 1£2,079 GBP
The Diamond Guys£3,667 GBP
Retailer 7£5,732 GBP

49 data points across 8 retailers

2 retailers£2,079 GBP to £3,667 GBP

B
Cheapest Retailer
-
£2,079 GBP
CA$3,870 CAD
Most Expensive
B
The Diamond Guys
1779253161 · Oct 30
£3,667 GBP
$4,914 USD
View
1 more retailer has this diamond
Prices start from £2,079 GBPSave up to £1,588 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
3.51ct Round
£2,079 GBP