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Round|Lab Grown|IGI

1.58ct G SI1 Round Lab Grown Diamond

EX • G/SI1

Diamond specifications and retailer prices

From £447 GBP
$599 USD
As of October 30, 2026
Save £609 GBP (58%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,056 GBP at Diamond Exchange Canada · As of October 30, 2026
View at Diamond Exchange Canada

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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI. Listed at 2 retailers as of October 30, 2026, with prices from £447 to £1,056, a £609 spread on the same certified stone. Diamond Exchange Canada lists it at £1,056. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions7.53 × 7.57 × 4.53 mm
L/W Ratio1.01
Top View
7.53 mm7.57 mm1.58 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 60.5%CrownGirdle: MED-SLTPavilionCulet: NoneDepth

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 30
Current: £1,056 GBP|Low: £447 GBP|High: £1,056 GBP|Avg: £752 GBP
Diamond Exchange Canada
Retailer 2
October 17, 2026
Retailer 2£447 GBP
Diamond Exchange Canada£1,056 GBP

2 data points across 2 retailers

2 retailers£447 GBP to £1,056 GBP

B+
Cheapest Retailer
-
£447 GBP
$599 USD
Most Expensive
C
Diamond Exchange Canada
1960631651 · Oct 30
£1,056 GBP
CA$1,966 CAD
View
1 more retailer has this diamond
Prices start from £447 GBPSave up to £609 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+
1.58ct Round
£447 GBP