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1.65ct M SI1 Round Natural Diamond

EX • M/SI1 • IGI 538272530

Shape and cutting style on the report: Round brilliant

Certificate IGI 538272530

Diamond specifications and retailer prices

From £1,363 GBP
As of November 4, 2026
Save £630 GBP (32%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,993 GBP at Yorxs · As of November 5, 2026
View at Yorxs

About this 1.65ct natural round diamond

This 1.65ct natural round sits in the one-and-a-half to two carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 538272530. Listed at 2 retailers as of November 4, 2026, with prices from £1,363 to £1,993, a £630 spread on the same certified stone. Yorxs lists it at £1,993. 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

1.65
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle41.3°
OriginNatural
Grading LabIGI
CertificateIGI 538272530
Dimensions7.60 × 7.50 × 4.70 mm
L/W Ratio1.01
Girdle conditionPARTLY FACETED
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
7.60 mm7.50 mm1.65 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 538272530
Side View
Table 59.5%Crown 36.1°Girdle: MediumPavilion 41.3°Culet: NoneDepth 62.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £1,363 GBP|Low: £1,363 GBP|High: £2,015 GBP|Avg: £1,727 GBP|-0.8%
Retailer 1
Retailer 2
Retailer 3
Yorxs
November 5, 2026
Retailer 1£1,363 GBP
Retailer 3£1,727 GBP
Retailer 2£1,817 GBP
Yorxs£1,993 GBP

22 data points across 4 retailers

2 retailers£1,363 GBP to £1,993 GBP

A
Cheapest Retailer
-
£1,363 GBP
Most Expensive
B+
Yorxs
5116 · Nov 5
£1,993 GBP
€2,555 EUR
View
1 more retailer has this diamond
Prices start from £1,363 GBPSave up to £630 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
1.65ct Round
£1,363 GBP