Crystals may be found.Logical formLearned from25 sentences. Crystals can be elemental.Logical formLearned from25 sentences. Crystals can be isolated.Logical formLearned from25 sentences. (Crystal glass plates) can be personalized.Logical formLearned from25 sentences. A crystal can be purple.Logical formLearned from25 sentences. A person may have a crystal.Logical formLearned from25 sentences. A crystal may grow.Logical formLearned from25 sentences. (Liquid crystal televisions) may feature a panel.Logical formLearned from25 sentences. Aggregates can be constituted-of-or-filled-with crystals.Logical formLearned from25 sentences. Crystals can be abrasive.Logical formLearned from25 sentences. Crystals can be constituted-of-or-filled-with feldspar.Logical formLearned from25 sentences. A male may use (crystal meth).Logical formLearned from25 sentences. A crystal can be transparent.Logical formLearned from24 sentences. Crystals can be needle-shaped.Logical formLearned from24 sentences. Crystals can be rare.Logical formLearned from24 sentences.