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Round|Natural|GIA

1.64ct M SI1 Round Natural Diamond

VG • M/SI1 • GIA 2537433746

Certificate GIA 2537433746

Diamond specifications and retailer prices

From £2,660 GBP
As of November 6, 2026
Save £1,411 GBP (35%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £4,071 GBP at Cape Diamonds · As of November 5, 2026
View at Cape Diamonds

About this 1.64ct natural round diamond

This 1.64ct 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 very-good cut grade and certified by GIA 2537433746. Listed at 7 retailers as of November 5, 2026, with prices from £2,660 to £4,071, a £1,411 spread on the same certified stone. Cape Diamonds lists it at £4,071. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.64
Carat
M
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2537433746
Dimensions7.44 × 7.49 × 4.70 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
7.44 mm7.49 mm1.64 ctM / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2537433746
Side View
Table 57.0%Crown 36°Girdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 63.0%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £4,071 GBP|Low: £1,493 GBP|High: £4,101 GBP|Avg: £2,355 GBP|+49.6%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 7£1,493 GBP
Retailer 8£1,811 GBP
Retailer 6£2,660 GBP
Retailer 5£2,879 GBP
Retailer 4£3,013 GBP
Retailer 2£3,632 GBP
Retailer 3£3,746 GBP
Cape Diamonds£4,071 GBP

37 data points across 8 retailers

7 retailers£2,660 GBP to £4,071 GBP

Retailer 1
-
£1,493 GBP
Price last confirmed 17 days ago
B
Retailer 2
-
£2,660 GBP
View
B
Retailer 3
-
£2,879 GBP
View
B
Retailer 4
-
£3,013 GBP
View
C
Retailer 5
-
£3,632 GBP
View
C
Retailer 6
-
£3,746 GBP
View
Most Expensive
C
Cape Diamonds
cert_2537433746 · Nov 5
£4,071 GBP
ZAR 88,508 ZAR
View
6 more retailers have this diamond
Prices start from £2,660 GBPSave up to £1,411 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
1.64ct Round
£2,660 GBP