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Round|Natural|GIA

1.63ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 5241039458

Certificate GIA 5241039458

Diamond specifications and retailer prices

From £2,898 GBP
As of November 5, 2026
Save £814 GBP (22%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £5,299 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.63ct natural round diamond

This 1.63ct 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 GIA 5241039458. Listed at 9 retailers as of November 5, 2026, with a 28% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.63
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 5241039458
Dimensions7.42 × 7.47 × 4.67 mm
L/W Ratio1.01
Star length50%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Cloud
Top View
7.42 mm7.47 mm1.63 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5241039458
Side View
Table 58.0%Crown 36°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 62.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £3,312 GBP|Low: £2,898 GBP|High: £3,738 GBP|Avg: £3,361 GBP|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 4£2,898 GBP
Retailer 1£3,312 GBP
Retailer 2£3,415 GBP
Retailer 3£3,712 GBP

34 data points across 4 retailers

9 retailers£2,898 GBP to £3,712 GBP

B+
Cheapest Retailer
-
£2,898 GBP
Retailer 2
-
£3,041 GBP
View
Price last confirmed 29 days ago
Retailer 3
-
£3,042 GBP
View
Price last confirmed 29 days ago
Retailer 4
-
£3,042 GBP
View
Price last confirmed 38 days ago
B+
Retailer 5
-
£3,312 GBP
View
B
Retailer 6
-
£3,415 GBP
View
Retailer 7
-
£3,509 GBP
View
Price last confirmed 38 days ago
B
Retailer 8
-
£3,712 GBP
View
Most Expensive
NZ Jewellers
77c4b5d9-f5d2-46ad-8e6d-880d14891f14 · Sep 28
£5,299 GBP
$7,132 USD
View
Price last confirmed 39 days ago
8 more retailers have this diamond
Prices start from £2,898 GBPSave up to £814 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+
1.63ct Round
£2,898 GBP