  The interface effects play important roles for the properties of strange
quark matter (SQM) and the related physical processes. We show several examples
on the implications of interface effects for both stable and unstable SQM.
Based on an equivparticle model and adopting mean-field approximation (MFA),
the surface tension and curvature term of SQM can be obtained, which are
increasing monotonically with the density of SQM at zero external pressure. For
a parameter set constrained according to the 2$M_\odot$ strange star, we find
the surface tension is $\sim$2.4 MeV/fm${}^2$, while it is larger for other
cases.
