Plural of burkite; multiple specimens or samples of the rare mineral composed of calcium, sulfate, and carbonate.
Plural of 'burkite' following standard '-s' pluralization; the original name combines a place or person's name with the mineralogical '-ite' suffix.
Mineral collectors can become obsessive about acquiring different specimens—a single rare mineral like burkite might be traded among collectors for decades, building entire collections of just a few grams of material.
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