Quartz is a quantum circuit optimizer that automatically generates and verifies circuit transformations for an arbitrary quantum gate set. To optimize an input quantum circuit, Quartz uses these auto-generated circuit transformations to construct a search space of functionally equivalent quantum circuits. Quartz uses a cost-based search algorithm to explore the space and discovers highly optimized quantum circuits. Quartz is open-source and developed on GitHub: https://github.com/quantum-compiler/quartz. This artifact supports the PLDI 2022 paper about Quartz, and contains the implementation and scripts used to obtain the results reported in the paper. See also the extended version of the paper at https://arxiv.org/abs/2204.09033.