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Round|Lab Grown|IGI

3.58ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG681558022

Shape and cutting style on the report: Round brilliant

Certificate IGI LG681558022

Diamond specifications and retailer prices

From £283 GBP
$379 USD
As of November 1, 2026
Save £846 GBP (75%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,424 GBP at Michael Trio · As of October 13, 2026
View at Michael Trio

About this 3.58ct lab-grown round diamond

This 3.58ct lab-grown round sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG681558022 or 681558022. Listed at 9 retailers as of October 31, 2026, with a 299% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

3.58
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG681558022
Dimensions9.83 × 9.77 × 6.04 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
HEARTS & ARROWS This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.83 mm9.77 mm3.58 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG681558022
Side View
Table 57.0%Crown 35.3°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 61.7%

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: Nov 1
Current: £1,424 GBP|Low: £283 GBP|High: £1,462 GBP|Avg: £858 GBP|+0.9%
Michael Trio
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 11£283 GBP
Retailer 9£317 GBP
Retailer 2£488 GBP
Retailer 5£564 GBP
Retailer 12£601 GBP
Retailer 4£838 GBP
Retailer 3£942 GBP
Retailer 8£984 GBP
Retailer 6£985 GBP
Retailer 10£1,128 GBP
Retailer 7£1,379 GBP
Michael Trio£1,424 GBP

41 data points across 12 retailers

9 retailers£283 GBP to £1,128 GBP

A
Cheapest Retailer
-
£283 GBP
$379 USD
A
Retailer 2
-
£317 GBP
$425 USD
View
A
Retailer 3
-
£488 GBP
View
A
Retailer 4
-
£564 GBP
€720 EUR
View
B+
Retailer 5
-
£984 GBP
$1,319 USD
View
B+
Retailer 6
-
£985 GBP
$1,320 USD
View
B+
Retailer 7
-
£1,128 GBP
$1,512 USD
View
Retailer 8
-
£1,379 GBP
View
Price last confirmed 11 days ago
Most Expensive
Michael Trio
3651762890 · Oct 13
£1,424 GBP
SGD 2,578 SGD
View
Price last confirmed 19 days ago
8 more retailers have this diamond
Prices start from £283 GBPSave up to £846 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
3.58ct Round
£283 GBP