Quartz formed below 573 degrees C, SiO2 possessing less symmetry and hardness than the same formed at a higher temperature
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Category: <span>L</span>
An ore of lithium, 3[K2Li4Al2(Si8O20(OH)4]
Ore containing a small but detectable grade of mineralization, favourable only if the extent of mineralization is enormous, consistent, and accessible
Lens shaped
Emitting light