cabochon — type of cut; with curved surface, no facets …
calcite — species of mineral; see calcite in ‘Classification’ …
carbonatite — intrusive or extrusive igneous rock defined by mineralogic composition consisting of greater than 50 percent carbonate minerals …
carnelian — variety of chalcedony, quartz; see carnelian in ‘Classification’ …
cassiterite — species of mineral; data; faceted specimens exist …
celestine — species of mineral; data; faceted specimens exist …
cerussite — species of mineral; see cerussite in ‘Classification’ …
chalcedony — variety of quartz; see chalcedony in ‘Classification’ …
charoite — species of mineral; see charoite in ‘Classification’ …
chondrite — a stony non-metallic meteorite; not modified due to melting or differentiation of the parent body …
chondrodite — species of mineral; see chondrodite in ‘Classification’ …
chondrule — round grain found in chondrites …
chrome-chalcedony — variety of chalcedony, quartz; see chrome-chalcedony in ‘Classification’ …
chromian diopside — variety of diopside; see chromian diopside in ‘Classification’ …
chromian pyrope — variety of pyrope; see chromian pyrope in ‘Classification’ …
chromium-dravite — species of mineral; see chromium-dravite in ‘Classification’ …
chrysoberyl — species of mineral; see chrysoberyl in ‘Classification’ …
chrysoprase — variety of chalcedony, quartz; see chrysoprase in ‘Classification’ …
citrine — variety of quartz; see citrine in ‘Classification’ …
citron chrysoprase — synonym of nickeloan magnesite …
