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3.73ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1559185723

Certificate GIA 1559185723

Diamond specifications and retailer prices

From £29,984 GBP
$40,175 USD
As of November 1, 2026
Save £23,694 GBP (44%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £53,678 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 3.73ct natural round diamond

This 3.73ct natural round sits in the three to five carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1559185723. Listed at 11 retailers as of November 1, 2026, with prices from £29,984 to £53,678, a £23,694 spread on the same certified stone. MOH London lists it at £53,678. 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

3.73
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1559185723
Dimensions9.79 × 9.84 × 6.15 mm
L/W Ratio1.01
Top View
9.79 mm9.84 mm3.73 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559185723
Side View
Table 58.0%CrownGirdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 62.7%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: £53,678 GBP|Low: £29,984 GBP|High: £55,092 GBP|Avg: £38,146 GBP|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 4£29,984 GBP
Retailer 10£31,104 GBP
Retailer 5£31,590 GBP
Retailer 11£32,484 GBP
Retailer 3£34,662 GBP
Retailer 9£35,422 GBP
Retailer 7£36,854 GBP
Retailer 8£36,854 GBP
Retailer 6£38,078 GBP
Retailer 2£41,523 GBP
MOH London£53,678 GBP

34 data points across 11 retailers

11 retailers£29,984 GBP to £53,678 GBP

B+
Cheapest Retailer
-
£29,984 GBP
$40,175 USD
B+
Retailer 2
-
£31,104 GBP
$41,676 USD
View
B+
Retailer 3
-
£31,590 GBP
€40,312 EUR
View
B+
Retailer 4
-
£32,484 GBP
$43,525 USD
View
B
Retailer 5
-
£34,662 GBP
$46,443 USD
View
Final sale: no returns
B
Retailer 6
-
£35,422 GBP
$47,461 USD
View
B+
Retailer 7
-
£36,854 GBP
$49,380 USD
View
B+
Retailer 8
-
£36,854 GBP
$49,380 USD
View
B
Retailer 9
-
£38,078 GBP
$51,020 USD
View
B
Retailer 10
-
£41,523 GBP
€52,987 EUR
View
Most Expensive
B
MOH London
9B51C241D · Nov 1
£53,678 GBP
View
10 more retailers have this diamond
Prices start from £29,984 GBPSave up to £23,694 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+
3.73ct Round
£29,984 GBP