noun
a type of mineral that belongs to the group of crinoids, marine animals related to starfish and sea urchins
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Actinocrinite is a type of mineral that forms in radiating clusters of needle-like crystals.
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I found a cool piece of actinocrinite while hiking in the mountains.
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Check out this funky actinocrinite I scored at the gem show!
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The actinocrinite crystals seemed to glow with an otherworldly energy.