Was rewarded with this ring, but the hallmark was very worn so I thought I'd test it's density to check how many carats it was because it was very heavy in comparison with a 9ct ring of a similar size.

Cup of water, Scobby Doo cup as a glass one tips my scales over the edge. Reset to Zero.

Ring suspended in water, just below the surface so as little cotton as possible is added to the equation.

Simple Math
3.91 / 0.25 = 15.64
Metal Density
Gold 19.3
Silver 10.5
Platinum 21.4
Palladium 12.0
Copper 9.0
9ct 10.9 to 12.7
14ct 12.9 to 14.6
18ct Yellow 15.2 to 15.9
18ct White 14.7 to 16.9
22ct 17.7 to 17.8
Sterling Silver 10.2 to 10.3
950 Platinum 20.1
18ct !

