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Round|Natural|GIA

3.16ct J SI2 Round Natural Diamond

ID • J/SI2 • GIA 805

Certificate GIA 805

Diamond specifications and retailer prices

From £18,054 GBP
$24,190 USD
As of October 30, 2026
Save £3,304 GBP (15%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £21,358 GBP at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 3.16ct natural round diamond

This 3.16ct natural round sits in the three to five carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA. Listed at 3 retailers as of October 30, 2026, with prices from £18,054 to £21,358, a £3,304 spread on the same certified stone. Blue Nile lists it at £21,358. 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

3.16
Carat
J
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 805
Dimensions9.31 × 9.35 × 5.82 mm
L/W Ratio1.00
Top View
9.31 mm9.35 mm3.16 ctJ / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 805
Side View
Table 58.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 62.3%

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: £21,358 GBP|Low: £18,054 GBP|High: £21,358 GBP|Avg: £19,263 GBP
Blue Nile
Retailer 2
Retailer 3
September 26, 2026
Retailer 2£18,054 GBP
Retailer 3£19,426 GBP
Blue Nile£21,358 GBP

2 data points across 3 retailers

3 retailers£18,054 GBP to £21,358 GBP

B+
Cheapest Retailer
-
£18,054 GBP
$24,190 USD
B+
Retailer 2
-
£19,426 GBP
$26,028 USD
View
Most Expensive
B
Blue Nile
14863325 · Oct 31
£21,358 GBP
$28,617 USD
View
2 more retailers have this diamond
Prices start from £18,054 GBPSave up to £3,304 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+
3.16ct Round
£18,054 GBP