Size-and shape-controlled synthesis of Au nanomaterials and their optical properties have been well explored in the past. However, the influence of crystallinity, particularly in the case of Au, which exists in the face-centered cubic (fcc) phase and is extraordinarily stable, is much unexplored. Recently, Au microcrystallites with unusually stable phases of body-centered tetragonal and body-centered orthorhombic lattices have been synthesized in the laboratory. These metastable crystallites possess unusual properties compared to their fcc counterparts. In this work, we have investigated the optical extinction properties of the microcrystallites while varying the noncubic mole fractions by carefully tuning the synthetic conditions. The crystallites show near-infrared plasmonic features associated with multipolar resonances. The experimental observations have been compared with calculations performed using the discrete dipolar approximation (DDA) method. While there is a reasonable agreement between the two, the noncubic nature of the lattice seems to have little influence on the optical properties investigated.