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Round|Lab Grown|IGI

1.58ct H SI1 Round Lab Grown Diamond

ID • H/SI1 • IGI LG691528762

Shape and cutting style on the report: Round brilliant

Certificate IGI LG691528762

Diamond specifications and retailer prices

From £407 GBP
$545 USD
As of October 25, 2026
2 retailers carry this diamond
Most expensive: £407 GBP at Rare Carat
View at Rare Carat

About this 1.58ct lab-grown round diamond

This 1.58ct lab-grown round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG691528762 or 691528762. Listed at 2 retailers as of October 25, 2026. 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

1.58
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG691528762
Dimensions7.46 × 7.42 × 4.63 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.46 mm7.42 mm1.58 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG691528762
Side View
Table 56.0%Crown 35.7°Girdle: MediumPavilion 40.7°Culet: NoneDepth 62.2%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 25
Current: £407 GBP|Low: £164 GBP|High: £634 GBP|Avg: £368 GBP|-0.9%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 7, 2026
Retailer 2£164 GBP
Retailer 3£166 GBP
Retailer 5£276 GBP
Retailer 7£292 GBP
Retailer 4£354 GBP
Retailer 10£355 GBP
Rare Carat£407 GBP
Retailer 8£458 GBP
Retailer 9£576 GBP
Retailer 6£634 GBP

2 data points across 10 retailers

2 retailers

Retailer 1
-
£164 GBP
$220 USD
Price last confirmed 46 days ago
Most Expensive
B+
Rare Carat
9000125630 · Oct 25
£407 GBP
$545 USD
View
1 more retailer has this diamond

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+
1.58ct Round
£407 GBP