function [granite] = initializeGranite()
    %%
    granite = struct();

    granite.m = 2000; % [kg]

    granite.k.x = 1e8; % [N/m]
    granite.c.x = 1e4; % [N/(m/s)]

    granite.k.y = 1e8; % [N/m]
    granite.c.y = 1e4; % [N/(m/s)]

    granite.k.z = 1e8; % [N/m]
    granite.c.z = 1e4; % [N/(m/s)]

    %% Save
    save('./mat/stages.mat', 'granite', '-append');
end