Cuspidine crystallizes in the monoclinic crystal system and occurs as acicular to spear shaped pale red to light brown crystals .
Cuspidine is a fluorine bearing calcium silicate mineral ( sorosilicate ) with formula : Ca ( Si O ) ( F , OH ) .
F crystallizes in the monoclinic crystal system and occurs as acicular to spear shaped pale red to light brown crystals .
Cuspidine is a fluorine bearing calcium silicate mineral ( sorosilicate ) with formula : Ca ( Si O ) ( F , OH ) .