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Round|Natural|GIA

3.15ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1509870766

Certificate GIA 1509870766

Diamond specifications and retailer prices

From £19,553 GBP
$26,199 USD
As of October 31, 2026
Save £10,249 GBP (34%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £29,802 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 3.15ct natural round diamond

This 3.15ct natural round sits in the three to five carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1509870766. Listed at 6 retailers as of October 31, 2026, with prices from £19,553 to £29,802, a £10,249 spread on the same certified stone. MOH London lists it at £29,802. 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

3.15
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1509870766
Dimensions9.25 × 9.33 × 5.83 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Key to symbols
Crystal, Cloud, Needle
Top View
9.25 mm9.33 mm3.15 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1509870766
Side View
Table 58.0%Crown 35.5°Girdle: STK-STKPavilion 41°Culet: NoneDepth 62.8%

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: Oct 31
Current: £29,802 GBP|Low: £17,068 GBP|High: £30,160 GBP|Avg: £21,852 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 4£19,553 GBP
Retailer 5£19,877 GBP
Retailer 3£20,185 GBP
Retailer 6£20,302 GBP
Retailer 2£22,592 GBP
MOH London£29,802 GBP

25 data points across 6 retailers

6 retailers£19,553 GBP to £29,802 GBP

B+
Cheapest Retailer
-
£19,553 GBP
$26,199 USD
B+
Retailer 2
-
£19,877 GBP
$26,633 USD
View
B+
Retailer 3
-
£20,185 GBP
$27,046 USD
View
Final sale: no returns
B+
Retailer 4
-
£20,302 GBP
$27,203 USD
View
B
Retailer 5
-
£22,592 GBP
€28,829 EUR
View
Most Expensive
B
MOH London
A2270A107 · Nov 1
£29,802 GBP
View
5 more retailers have this diamond
Prices start from £19,553 GBPSave up to £10,249 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+
3.15ct Round
£19,553 GBP