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1.58ct L SI1 Round Natural Diamond

EX • L/SI1 • IGI 782659005

Shape and cutting style on the report: Round brilliant

Certificate IGI 782659005

Diamond specifications and retailer prices

From £1,672 GBP
As of November 3, 2026
Save £151 GBP (8%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,823 GBP at Moon Ocean · As of November 2, 2026
View at Moon Ocean

About this 1.58ct natural round diamond

This 1.58ct natural round sits in the one-and-a-half to two carat band, graded L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 782659005. Listed at 2 retailers as of November 2, 2026, with a relatively tight 9% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
L
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle40.9°
OriginNatural
Grading LabIGI
CertificateIGI 782659005
Dimensions7.34 × 7.36 × 4.66 mm
L/W Ratio1.00
Girdle conditionFaceted
Top View
7.34 mm7.36 mm1.58 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 782659005
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 62.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 3
Current: £1,823 GBP|Low: £1,134 GBP|High: £2,913 GBP|Avg: £1,837 GBP|-2.8%
Moon Ocean
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 6£1,134 GBP
Retailer 3£1,667 GBP
Retailer 2£1,672 GBP
Retailer 4£1,771 GBP
Moon Ocean£1,823 GBP
Retailer 5£2,913 GBP

23 data points across 6 retailers

2 retailers£1,672 GBP to £1,823 GBP

A
Cheapest Retailer
-
£1,672 GBP
Most Expensive
B+
Moon Ocean
NVN-1568BF83C-005 · Nov 2
£1,823 GBP
View
1 more retailer has this diamond
Prices start from £1,672 GBPSave up to £151 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
1.58ct Round
£1,672 GBP