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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 $37,297 AUD
$26,199 USD
As of November 2, 2026
Save $19,549 AUD (34%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $56,846 AUD 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 November 1, 2026, with prices from $37,297 to $56,846, a $19,549 spread on the same certified stone. MOH London lists it at $56,846. 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: Nov 2
Current: $56,846 AUD|Low: $32,556 AUD|High: $57,530 AUD|Avg: $41,695 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 4$37,297 AUD
Retailer 5$37,915 AUD
Retailer 3$38,503 AUD
Retailer 6$38,726 AUD
Retailer 2$42,903 AUD
MOH London$56,846 AUD

26 data points across 6 retailers

6 retailers$37,297 AUD to $56,846 AUD

B+
Cheapest Retailer
-
$37,297 AUD
$26,199 USD
B+
Retailer 2
-
$37,915 AUD
$26,633 USD
View
B+
Retailer 3
-
$38,503 AUD
$27,046 USD
View
Final sale: no returns
B+
Retailer 4
-
$38,726 AUD
$27,203 USD
View
B+
Retailer 5
-
$42,903 AUD
€28,702 EUR
View
Most Expensive
B
MOH London
A2270A107 · Nov 1
$56,846 AUD
£31,442 GBP
View
5 more retailers have this diamond
Prices start from $37,297 AUDSave up to $19,549 AUD

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
$37,297 AUD