Valence and spin states of Fe were investigated in a glass of almandine (Fe$3$Al$2$Si$3$O$\mathrm{<mrow\; data-mjx-texclass="ORD">12</mrow>}$) composition to 91 GPa by X-ray emission spectroscopy and energy- and time-domain synchrotron Mössbauer spectroscopy in the diamond-anvil cell. Changes in optical properties, total spin moment and Mössbauer parameters all occur predominantly between 1 bar and ~30 GPa. Over this pressure range, the glass changes from translucent brown to opaque and black. The total spin moment of the glass derived from X-ray emission spectroscopy decreases by ~20%. The complementary Mössbauer spectroscopy approaches reveal consistent changes in sites corresponding to 80–90% Fe$\mathrm{<mrow\; data-mjx-texclass="ORD">2+</mrow>}$ and 10–20% Fe$\mathrm{<mrow\; data-mjx-texclass="ORD">3+</mrow>}$. The high-spin Fe$\mathrm{<mrow\; data-mjx-texclass="ORD">2+</mrow>}$ doublet exhibits a continuous decrease in isomer shift and increase in line width and asymmetry. A high-spin Fe$\mathrm{<mrow\; data-mjx-texclass="ORD">3+</mrow>}$ doublet with quadrupole splitting of ~1.2 mm/s is replaced by a doublet with quadrupole splitting of ~1.9 mm/s, a value higher than all previous measurements of high-spin Fe$\mathrm{<mrow\; data-mjx-texclass="ORD">3+</mrow>}$ and consistent with low-spin Fe$\mathrm{<mrow\; data-mjx-texclass="ORD">3+</mrow>}$. These observations suggest that Fe$\mathrm{<mrow\; data-mjx-texclass="ORD">3+</mrow>}$ in the glass undergoes a continual transition from a high-spin to a low-spin state between 1 bar and ~30 GPa. Almandine glass is not expected to undergo any abrupt transitions in electronic state at deep mantle pressures.