A rock or mineral composed of two types of quartz crystals or two distinct quartz components.
From Latin 'bi-' meaning 'two' combined with 'quartz,' the hard crystalline mineral. The term emerged in geology to describe composite quartz formations.
Geologists use 'biquartz' to identify rocks that have undergone complex crystallization, where two separate quartz generations crystallized at different times—it's like reading the rock's autobiography in minerals!
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