We present measurements of element abundance ratios and dust in Ca ii absorbers identified in SDSS DR7+DR9 .
In an earlier paper we formed a statistical sample of 435 Ca ii absorbers and postulated that their statistical properties might be representative of at least two populations of absorbers .
Here we show that if the absorbers are roughly divided into two subsamples with Ca ii rest equivalent widths larger and smaller than W _ { 0 } ^ { \lambda 3934 } = 0.7 Å , they are then representative of two physically different populations .
Comparisons of abundance ratios between the two Ca ii absorber populations indicate that the weaker W _ { 0 } ^ { \lambda 3934 } absorbers have properties consistent with halo-type gas , while the stronger absorbers have properties intermediate between halo- and disk-type gas .
We also show that , on average , the dust extinction properties of the overall sample is consistent with a LMC or SMC dust law , and the stronger absorbers are nearly 6 times more reddened than their weaker counterparts .
The absorbed-to-unabsorbed composite flux ratio at \lambda _ { rest } = 2200 Å is \mathcal { R } \approx 0.73 and E ( B - V ) \approx 0.046 for the stronger Ca ii absorbers ( W _ { 0 } ^ { \lambda 3934 } \geq 0.7 Å ) , and \mathcal { R } \approx 0.95 and E ( B - V ) \approx 0.011 for the weaker Ca ii absorbers ( W _ { 0 } ^ { \lambda 3934 } < 0.7 Å ) .