  The effects of an impurity plaquette on the thermal quantum correlations
measurement by the concurrence, on the quantum coherence quantified by the
recently proposed $l_{1}$-norm of coherence and on the quantum teleportation in
a Ising-$XXZ$ diamond chain are discussed. Such an impurity is formed by the
XXZ interaction between the interstitial Heisenberg dimers and the
nearest-neighbor Ising coupling between the nodal and interstitial spins. All
the interaction parameters are different from those of the rest of the chain.
By tailoring them, the quantum entanglement and quantum coherence can be
controlled and tuned. Therefore, the quantum resources -- thermal entanglement
and quantum coherence -- of the model exhibit a clear performance improvement
in comparison to the original model without impurities. We also demonstrate
that the quantum teleportation can be tuned by its inclusion. The thermal
teleportation is modified in significant way as well, and a strong increase in
average fidelity is observed. We furnish the exact solution by the use of the
transfer-matrix method.
