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Reference.org
Bornite
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<p>Bornite, also known as peacock ore, is a <a href="/facts/Sulfide_mineral/f8rxJpCW">sulfide mineral</a> with <a href="/facts/Chemical_composition/vjo4uMQ0">chemical composition</a> <a href="/facts/Copper/I8PEE8oX">Cu</a>5<a href="/facts/Iron/QK1JYy8E">Fe</a><a href="/facts/Sulfur/IK0amTfM">S</a>4 that <a href="/facts/Crystallization/oCUUG80k">crystallizes</a> in the <a href="/facts/Orthorhombic_crystal_system/3zo4F8P0">orthorhombic system</a> (pseudo-cubic). It is an important copper ore. </p>