Round|Natural|GIA

3.15ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1509870766

Certificate GIA 1509870766

Diamond specifications and retailer prices

From $26,199 USD
As of October 30, 2026
Save $13,946 USD (35%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $40,145 USD at MOH London · As of October 29, 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 29, 2026, with prices from $26,199 to $40,145, a $13,946 spread on the same certified stone. MOH London lists it at $40,145. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $40,145 USD|Low: $22,869 USD|High: $40,411 USD|Avg: $29,268 USD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 31, 2026
Retailer 4$26,199 USD
Retailer 5$26,633 USD
Retailer 3$27,046 USD
Retailer 6$27,203 USD
Retailer 2$30,270 USD
MOH London$40,145 USD

24 data points across 6 retailers

6 retailers$26,199 USD to $40,145 USD

B+
Cheapest Retailer
-
$26,199 USD
B+
Retailer 2
-
$26,633 USD
View
B+
Retailer 3
-
$27,046 USD
View
Final sale: no returns
B+
Retailer 4
-
$27,203 USD
View
B
Retailer 5
-
$30,270 USD
€28,829 EUR
View
Most Expensive
B
MOH London
A2270A107 · Oct 29
$40,145 USD
£31,610 GBP
View
5 more retailers have this diamond
Prices start from $26,199 USDSave up to $13,946 USD

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
$26,199 USD