A (crystal system) can be hexagonal.Logical formLearned from53 sentences. Crystals can be colorless.Logical formLearned from53 sentences. Crystals can be monoclinic.Logical formLearned from52 sentences. (Ice crystals) may form.Logical formLearned from52 sentences. Crystals may grow.Logical formLearned from52 sentences. An one may have a (crystal ball).Logical formLearned from52 sentences. Crystals can be transparent.Logical formLearned from51 sentences. A crystal can be white.Logical formLearned from50 sentences. A size may pertain-to crystals.Logical formLearned from49 sentences. Crystals can be colored.Logical formLearned from49 sentences. Somebody may have a (crystal ball).Logical formLearned from49 sentences. Crystals can be tabular.Logical formLearned from48 sentences. Crystals may be formed.Logical formLearned from47 sentences. Features may include a (mineral crystal).Logical formLearned from47 sentences. Crystals can be shaped.Logical formLearned from47 sentences.