What is another word for "crystal"?

Roget's Thesaurus (1911) lists these synonyms for "crystal": adamant, adamantean, adamantine, aruspex, aruspice, astrologer, augur, block, board, bone, bony, brick, buckram, calculous, callosity, cartilage, cartilaginous, cast, cement, clarity, clear, concrete, corneous, country, crag, crystalline, crystallization, deal, diaphaneity, diaphanous, durity, firm, flint, fluorescence, forecaster, fortune, fossil, gazer, geomancer, glass.