  Let $X$ be a Calabi-Yau threefold. A conifold transition first contracts $X$
along disjoint rational curves with normal bundles of type $(-1,-1)$, and then
smooth the resulting singular complex space $\bar{X}$ to a new compact complex
manifold $Y$. Such $Y$ is called a Clemens manifold and can be non-K\"{a}hler.
We prove that any small smoothing $Y$ of $\bar{X}$ satisfies
$\partial\bar{\partial}$-lemma. We also show that the resulting pure Hodge
structure of weight three on $H^3(Y)$ is polarized by the cup product. These
results answer some questions of R. Friedman.
